Do you ever just "not know" how you feel anymorr

Things can change drastically I've learned in the 8 years since I was diagnosed. Almost all the symptoms you list I have pretty similar symptoms except the warm feeling you think might be reflux. I get back pain when I eat. I asked my GI about it and he told me my terminal ileum is so scared its probably referring pain to my back. I also have more constipation then diarreah. I take pain medication so that might contribute.
I have to force myself to eat, no appetite, nausea and hunger at the same time. I know when I had intususeption I had horrible nausea I was starving but as soon as food went in my mouth I'd have to spit it out, some of the worst stomach pain ive ever had and then I started bleeding from my rear and was sent away from the ER only to have a CAT scan done 5 days later and be admitted. If my intususeption wasn't reducing and happening again. I wouldn't be here today. I'm in horrible joint pain since starting remicade. I had joint pain before but this is different my joints are red swollen stiff and very painful. I'm waiting to see a rheumatologist to find out if I have another diagnosis. I write long posts too. I have a thread asking "Anyone taken remicade prednisone and azathioprine at the same time?"
Its so hard to know with Crohns. You can get an obstruction, perforation, fistula, intususeption (uncommon). Many things can happen very quickly. Don't second guess yourself, its always better to call and ask questions or get an appointment if your not sure if your ok. Better safe then sorry, I learned that the hard way last November I spent 11 days in the hospital w a severely swollen colon. I didn't have that much different symptoms except my side started to hurt more. If I'd been seen sooner I might've had a shorter hospital stay. Everyone's different though. Are you on any medications? If so I would also look at the warnings for when to call a doctor. Call and be persistent if you think something's really wrong. Like I said better safe then sorry.

just before my surgery last fall, i was feeling so bad my brain got all cross-wired. i couldn't tell the difference between having to poop, having to pee, being hungry, or just being in pain. it all felt exactly the same. so i'd have to go down a checklist "well i cant eat any more so its not hunger, guess i'll go to the bathroom, see if its one of those. nope, guess im just feeling bad today."

after the surgery, while i was recovering, my brain started to un-cross, but it had to re-learn everything. for a while, hunger was expressed as nausea (idiot brain), and everything else felt like bloating. but eventually it figured it out, and now i can at least understand what my body is trying to tell me about what it needs.

as for what's worth calling the doctors over... i watch my weight. my GI knows about all of my regular symptoms, and after having a couple VERY bad flares (the first was diagnosis, second was right before my surgery) I've learned that if my appetite drops for more than about a week, I need to watch the scale very closely. If THAT starts dropping at all, I need to call the doctor. Both major flares were the only time my weight ever went down, so if it drops again I'm in deep... uh, crap.

If something COMPLETELY new happens, that's definitely worth calling about. Or if something is consistently worse. Or if you notice something being particularly bothersome, like the heartburn. And, if you're not sure, just call anyway. It's your doctor's job to keep track of your symptoms and how you're doing. Your job too, of course, but it's a team effort.