Bleeding?

I got my period may 20 through the 25 and I haven’t had sex since then and this Tuesday I went to go use the bathroom and when I wiped there was a light pink blood and today it was the same thing, I’m on the pill but I have been super busy this month so I have been taking it irregular and my stomach is having slight cramps, my next period is in 11 days and I’m not sure why this is happening, I can’t be pregnant bc ive already got my period and I haven’t had sex since before my last period so I have no idea what’s going, any suggestions?