I had a regular period on march 12 I had unprotected sex on April 11 I was a week late on my period I came on the 19 th it was not my normal cycle my first day I was barley bleeding day 2 its like I stopped an the next 2 days it was like a light pink then to brown but it only would come on tissue paper so could sombody please help me figure this out I also have mild cramps on an off mostly at night

Since this can either happen because your period is changing, you have a std, or when your pregnant, you would be better off seeing a family health center clinic, because they are really the only ones that can tell you 100% that your pregnant.