What Causes Spotting After Intercourse?

Hello ,I had a surgic abortion 2months ago..i bleed for like 3weeksnot too heavy though then it stopped.have not had a regular period and I had an unprotected sex with my partner so I used the emergency contraceptive..the problem is I spot after sex and I don't think its normal.can you help me out here..because I don't seems to understand my body anymore.