I`m going to stick my neck in the block and tell you what I think is wrong with you.
Most likely absolutley NOTHING. Firstly, in my experience advice on here is at best `iffy` and at worst wildly off the mark. A lot of people on `health forums` are `worried wells` and are quite happy to write whatever `they` fear.Its a shame as some are genuinley knowledgeable and have their input `clouded`. Anyway, my girlfriend was on Depo Provera for a couple of years. Unexplained vaginal bleeding was unfortunately a side effect for her. Other side effects are mood changes and nervousness (your posts)Anyway, she bled every time during sex and although it was painless it wasn`t right so eventually she gave up and resorted to another contraceptive method.
I`ve read your other posts and as you say, you`ve tested negative for various things because you ARE negative.
Try not to worry as `worry` symptoms are usually thought on as other symptoms.
Ok, well you give no background to what is going on so no one can help you until you do.