Advice much appreciated.

about 7 years ago I had a miscarriage.When I was sent home from hospital my lower right abdomen began bulging and going hard on and off.I developed constipation and haemorrhoids as a result.I had some vague scans during that time (becasue of the miscarriage) and they always mentioned "alot of bowel" or "alot of air in there".It still bulges and slides about at times now (about twice a week).It doesn't hurt but is unsettling at the time.I also get alot of noise like trapped air inside my bowels.
More recently I began having constipation every day.At least I think it counts as such.I don't get piles now,and there is no need to strain but the stool is always very dry and there is brown 'jelly' often with it,despite having daily bowel movements.I noticed I have had some less than 12 hour B.M's which were still fairly dry.I thought it was a food intolerance so cut out wheat and dairy but no change.A few times I've had such intense pain suddenly strike in my chest and shoulders,it lasts about 15 minutes then subsides.During the strike it has me laying on the floor no matter where I am or what I'm doing.My eyes go bloodshot and then a bowel movement follows.I'm totally wiped out after it and feel bruised inside my stomach/chest for the rest of the day and some of the next.My G.P shrugged, literally, at this when I told her it was happening.
In the past month a new development has occurred. I had a painless,one-off bowel movement of explosive diarrhoea. No more Bowel movements that day.next day it was back to dry stool.Then a week later the exact same thing happens.
Some times my stomach is so large and solid that people keep assuming I'm pregnant!
I'm not pregnant,I've checked,and I have this frequently.My period is normal.My G.P has checked for lumps inside my anus and all clear.My heart has been tested with an ECG and was normal. I'm not sick or nauseous and no blood in stool (It's been tested with a home kit and non visible).
I get acid in my throat daily with grinding hunger-type pains on and off.I have no appetite and feel full all the time (and have done since 7 years ago) some foods like pastry,chocolate cake,white bread etc..I tend to avoid as they make symptoms much much worse.As I've said i've tried cutting out foods for months and no change.I've eaten masses of fibre but no change.I drink bottle after bottle of water.So what's happening?
If anyone has any idea what could cause any of these symptoms then please let me know.

Yeah, if your problem is dry stool, a stool softener should help by retaining water in the colon. Unlike stimulant laxatives, osmotic laxatives like Miralax are safe to take long term as well.

The brown 'jelly' is almost certainly mucus.

Have absolutely no idea about the chest/shoulder pains :-/ But fatigue after a difficult BM or alternating diarrhoea and constipation is fairly common.

You say you always feel full and have no appetite. Look up gastroparesis, you could have that. Aside from the lack of nausea/vomiting, you do have many other symptoms of it.

Other than that, I just don't know. It doesn't sound amazingly like Crohn's to me, but that said, you should get diagnoses like Crohn's ruled out before a doctor concludes that it's IBS or - dread word - 'stress'.

Good luck, sorry I couldn't help more :-/

The shoulder pain sounds very much like gas, which is understandable given the dry stool (still think it's slow motility). I don't know what the sweetcorn test is, and perhaps if you ate more spring greens you wouldn't have such dry stool.

With GERD I have found that ppis may stop working after a while. I had to switch from Nexium to prevacid after about a year on the Nexium. Maybe it's worth trying a different version.

I wonder about trapped wind too.hummmm.
That's interesting about your acid meds stopped working after a while.Maybe I should try another.I tried one before this one but it made me feel so sick she changed it over,so might not be much choice.
I eat alot of veggies and fruit.I eat greens when in season.As I'm practically vegetarian veggies are my friend.That's why it's such a mystery with the dry stool as I avoid wheat,dairy,meat.I think you could be onto something with the slow motility there.The sweetcorn test;as sweetcorn doesn't get digested it is passed whole and visible in stool.You can test your bowel speed by eating some then watching for when it reappears.
mine was in and out in less than 12 hours which didn't add up.Spring greens are the same,they don't get digested so big pieces are visible in stool.
Maybe my stress is playing a big role in the function here? Hopefully not heart.I'm due for a 24 hour monitor but an 8 week wait.I've just had a week wearing one and it told me I was dead,lol, so she has to do another test.
Thanks again for all your helpful suggestions,I'm really pleased I popped in here :) xx