i had the mirena iud for 3 months. I bled bad with it so i got it taken out. the same day i got it taken out i got the depo shot.. i had unprotected sex the same day. its almost been 3 months since that, i ve been spotting on an off since, with cramping, tiredness , and slight weight gain what does that mean. im 20, 145lbs, animic.