sex and spotting

So I had sex with my husband last night and after I was bleeding a little... pinkish reddish blood but only when wiping and today looks more like brownish reddish only when wiping. I'm supposedly 7 weeks 6 days, I may be overacting and I did read that it happens with sex sometimes... I'm not cramping and I guess I'm just anxious!!! Anyone else experience this sometimes...???