This has got to be really difficult for you. It can really take some time for some women... Sometimes even a few months
IF I remember correctly you can try drinking two to three cups of sage tea a day. And then there is the Green cabbage trick. Try putting cabbage leaves over your breasts to help dry up the milk supply. Crush them a little bit and place them over your breasts inside your bra. Change them when they wilt, but leave them on around-the-clock for 48 hours. Things to avoid would be any kind of nipple stimulation, avoid heat for any relief of discomfort (like heating pads, hot water bottles, hot showers) it can aggravate the situation. And, don't bind your breasts. This may actually increase the pain, while providing no real benefits.
I wonder if there is anything your Dr. can do for you? Maybe there is a medication you could take to dry up your supply?
As for AF... I think once your polactin and other hormone levels are back down to pre nursing levels when your supply decreases enough, you will probably ovulate and AF will likely return 2 weeks after that.
I hope something works quickly for you.