My youngest son was born almost 4 months ago, my husband is in the military so we haven't had sex since the day before he was born. I got off my period about a week before he came home on leave, after he had been home for 2 days I started spotting after intercourse. It was really light pink tinged. Now I'm bleeding very heavily and the blood is bright red. I have been bleeding for 3.5 days now. I have no pain or anything else. My PP check-up was at 10 weeks and my std and all other tests came back normal. We had intercourse 4-5 times before the bleeding started. I'm on the mini pill. Not sure what's going on!