Possibly an anal fissure? It is also possible that there's hemorrhoids causing the problem.
In the meantime of waiting for your tests and diagnosis it might be worth trying a good probiotic and drinking cranberry juice. Anti biotics can kill off the good bacteria , certainly worth doing. If tests come back normal ask if crohns and celiac could be an issue.
Best of luck
I have an appointment again tomorrow. I take probiotics, and have noticed that drinking milk makes it bad. Is it possible for the doctor to miss internal hemorrhoids with a finger exam? I had that done two weeks ago. Just wondering.
Hope your doctors appointment went ok, ... Its always possible a hemorrhoid has been missed but when you have the colonoscopy the gastroenterologist will be able to check you thoroughly so you won't be left wondering what's going on. I know it's easy to say but try to put second guessing to the back of your mind and wait for the scope to be done. Write a list of any questions you might want to ask such as the possibility of food intolerances should your results still come back as normal. ( hopefully they will be normal and diet is the answer ) lets know how you're getting on