I got the depo birth control shot on May 19th I have always had an irregular period, but I had my period April 3rd-8th the month before the shot and may 3rd-8th 11 days before the shot, after the shot my next period a Was June 6th-11th but was mostly cramps and not much blood, (I usually have a heavy flow) but this month I started having cramps on july 3rd so I put in a tampon before I saw blood, just in case, but about 3-4 hours later I took it out and there was nasty stuff, and not a lot at all, I didn t bleed at all since then but still had cramps, and today is July 14th I want to know if IS should be worried ,I have had sex without a condom, but he never finished in me, If that matters?Should I be worried or no?