I am no doctor
but to me this dosent sound like period bleeding.
as you are militray, go to the doc (it is free) and tell him you want to have an Ultra sound of your ovarian area dont let them fob you off saying just after bith stuff.
sorry but you are in the age group that are more prone to having problems in this area and it is very common for african american women to have a lot of cists on thier overies. never the less you are in pain and concerned go to the DOc and dont let them fob you off, talk to them untill you get the answer that helps you out
also how often have you had this problem because it could be an eptopic pregnancy, which means it is in the tube and not where it should be this can be life threatning to you.