So almost 2 and a half weeks ago my SO got fucked up on some pills his friend gave him and came back to his place and I could tell something was up but he said nothing was so I just let it be he ended up fucking me for like 5 minutes before he finished and then passed out for probably an hour and half while he sweated out whatever he had taken. When he finally came to I acted like I was asleep and he got up got dressed and left. I didn't know where he was going but didn't say anything just let him leave he texted me an hour later and explained he had taken pills and didn't remember anything didn't even remember how he got home and asked if we had sex I told him yes. He told me he was trying to find plan b but everywhere was out and he asked if I'd ride with him to another Walmart about 45 minutes away i said ok. We found one and I took it and figured everything was ok just because he hadn't actually finished in me. I started my period about 3 days later. My period ended a week ago today but the past two days I've noticed it blood. Is this something I should be concerned about or no? I don't usually have spotting after my period especially a week after it ended. What's going on??