Waking at 4 am to go to bathroom, can't go, shaking inside.

What can I do to prevent this from happening?

How long have you had this and what other symptoms are you having?  Have you eaten anything you wouldn't normally eat?  Are you eating enough fibre contained in fruit and vegetables?  If your symptoms have lasted longer than a week, see your doctor.

go to the dr.  it's not normal

That's not helpful. I have a call in to my gastro. but nobody tells me what to do. Forget what's normal? IBS isn't normal! There are probably a lot of people who are plaugued with this. I NEED HELP.

are you taking medication for IBS? A dr is the only one that can help you.  he if he doesn't FIND ANOTHER ONE!  I HAD TO GO THROUGH 2 GASTRO

I went eight times to different doctors and had numerous tests.   It can be a long and hard road to diagnosis.