new to site and need to be calmed

If you aren't expelling blood, dehydrated, or in unmanageable pain I would vote against going to the ER. Are you keeping a food log and noting when you have your symptoms? It might help some of the anxiety to focus on doing that and it could help you and your G.I. doc identify any trigger foods you may have. People usually say the cliche about looking on the bright side and not worrying until there is a reason to worry, but I know that can be difficult when you're stressed and don't know what's going on. I find it helps to look up what to expect when seeing the GI doc and what they suggest you should have prepared. You can't diagnose yourself, but you can come with all the information so your doc can diagnose you and help you a lot quicker. Hopefully, doing something productive towards your diagnosis will improve your sleep!

I wouldn't cut it without keeping a record of how much you have consumed first. Caffeine is often implicated in issues with the digestive tract, so the coffee may be the culprit. I'd suggest starting a food log. It will let the doc see exactly what you consume, get rid of the problem of them not believing you when you say you aren't eating, and will make you more aware of what you're putting into your body. Just make sure to include the amounts of food. I remember a story a doctor once told me regarding a patient who came to them with extreme anxiety. The patient, when asked how much soda they drink, said "just one or two". The doctor had enough forethought to ask "one or two what". Turns out, the patient was drinking costco-sized bottles of coke by herself, every day. She didn't have anxiety, just a caffeine overdose, but it would have been missed without the doctor having the information on the amount she drank.