Embarrassing problem

I have a very embarrassing problem. Firstly I have Heamorroids but I haven't seen a doctor about this yet. I have also been constipated.  These issues are not too bad and not giving me any pain. The problem that is really getting me down is that my anus smells. When I shower it goes away but doesn't take very long to come back.  I also wash down below every time I go to the toilet and I've used anti bacterial soap.  Its a disgusting smell. I cant describe the smell other than a dirty bottom but I'm not dirty and shower and wash everyday. This is really worrying me. Please help. I'm too embarrassed to go to the doctors about it ??