Hi Little flower,
Yikes, I know all about fear factor in the bathroom, constipation can be a real problem and can prevent you from losing weight, which is demotivating. I find drinking plenty of water and taking a spoon of fibre everyday helps me. Also, I personally find, that after my 2 coffees in the morning I go. I had some trouble and it was excruciatingly painful but I've learned my lesson and now take senokot when I've gone more than 4 days without going. My advice, drink water, take fibre, and take a mild laxative if you are not going naturally.
Good luck and as Princess said, there are not sacred subjects here!!!