Harrigan, you MUST contact your GP and ask for a double appointment so that you can about both your night time fears and your bowel problems.
There are many reasons for such problems, most can be treated. They do not just go away, and the longer you leave it the worse they can become. Are the night time fears related to this -do you think you may have some dreadful illness?
Do write down quite clearly, all the causes you to have dark fears, and also write down clearly everything about your bowel movements. How bad are they, any particular foods that make them worse, times of the day/night that cause problems. Check them yourself, is there any mucus or blood in them.
Do not be afraid - most bowel problems can be treated, but the sooner the better. You may firstly have a telephone consultation with your GP, but he/she will the arrange for you to come to have physical check, and then can send you - if necessary = for a colonoscopy.
People do panic and get embarrassed when this part of their system seems to go wrong. It is not embarrassing to the Doctor, just another section of the human body.
Even when it is very bad - there is a lot that can be done. Forty years ago, my bowels went wrong,- after ten years of much treatment and medication, and feeling very, very ill most of the time, I gave in to the medics and had a total, unreversable, ileostomy. Marvellous result, became well for the first time in a decade, and have lived my life fully and actively since then - yes with that little bag, No problems though, Did so wish I had gone along with that many years earlier.
Please try to stop worrying, and do something today. Try NOT to eat later in the evening at all, but do drink, - water or water based drinks often. Steer clear of fatty foods, including cheese. Problem with cup a soups is their high salt content, best is just to have something like a green tea or fruit flavoured tea (whichever you prefer), and a very plain biscuit to accompany it.
Most important advice is STOP WORRYING AND GO TO GP
Do let us know h ow you get on.