What is going on?

Hi there I have had ibs for many years. I now have fibromyalgia too. Usually my ibs will affect me for the odd day here and there,usually with severe diarrhoea.I changed my diet quite a bit last July and lost 3 stone with slimming world and the ibs improved even more,I was so pleased.
Ten days ago I got a terrible heavy bloating feeling in my lower abdomen and found it hard to walk. Since then I've seen my doc 3 times and spent a night in hospital. The pain has been so bad and has been unrelenting especially after eating. I now don't want to eat because it makes things worse but I know that's not an option. I've had urine tests which came back with blood in it so I've been put on antibiotics for a water infection.ive had X-rays with the dye to show up my kidney and bladder. All looked normal.
I've got to go for an ultrasound and maybe a colonoscopy. Have been given mebeverine as well. I'm so worried I case there's something nasty going on. My blood tests came back normal.
I just want to get back to how I was before I was doing so well now I can barely look after my kids and my poor dogs are in kennels as I can't look after them. I'm a single parent,luckily the kids dad has had them while I was in hospital.

I'm sorry I didn't get to replying before now. Some issues came up here at home.

I'm also sorry about your sudden illness. I wish I had some ideas about what is causing your pain after eating. Did they test your gall bladder? I also encourage you to follow through with getting the ultra sound and colonoscopy. The colonoscopy will show if there is an issue in your colon and lower end of the small bowel. I don't know what part they are ultrasounding so can't comment. It sounds like the doctor is taking your problem seriously and is looking for answers with the testing.

It's hard to endure illness when one doesn't know the cause. I wish I had more answers for you. It does sound like something is going on with the sudden onset of your problem. Congratulations on your weight loss. I know how hard it is to do that!