Is this normal?

Abigail

So I had period Jan 30. Normal. Mild flow. Bled for 3-4 days and stopped for about 3 days now. Well I went to the bathroom and it’s only when I wipe there is blood, bright red. I thought I was done with my period?! Is this normal? I had sex Jan 18 (pull out method) but I don’t think it’s that.