Everyone is different, from what I've found. This is just "normal" for you. The biggest suggestion would be to start charting your temps you can use programs like fertilityfriend.com to help determine if you are even ovulating. Knowing exactly when you ovulate with greatly increase your chances of catching that egg even with all the medical problems you are facing. It's like having a road map to you destination.
You will be able to learn a lot about your cycles and body. See if your LP (Luteal phase) is normal and consistant, it will even show if and when depo leaves your system as well. It also gives us a visual to help interpret your cycles as well.
For me I bled for 3 months straight NON STOP! Some don't bleed at all, it really just depends on the chemical make-up of ones own body.
Please stop by often and tell us what is happening and how things are going.