So my boyfriend & I had unprotected sex on Monday on 9/24, he cummed inside twice. Thursday morning on 9/27, I had really painful cramps & was bleeding a lot at first but later in the day it was going away & had brown stuff coming out then it stopped. I was suppose to get my period on Saturday 9/29 but I never got it. I don't know what's going on & I'm really getting worried. Please help me!