Light bleeding after intercourse..

After sex with my husband tonight I went to the bathroom and wiped pink blood.. So worried, I talked to the nurse at my doctors office earlier and she told me if it gets worse and heavy bleeding to go to the er but it's been a couple hours now  and after a couple times of going to the bathroom it's stopped..this is my second pregnancy and I didn't experience this with my first.. Has anyone else had the same thing?!?