Please help

Demona • Pokémon Go...Goth tomboy and animal lover

Is there any chances of pregnancy after withdrawal bleeding of 4days? Please help? I had taken pill after sex..

I had unprotected sex on 5/06/17, my cycle is of 28days and last periods was on from 28/05/17 to 02/06/17, I took Ipill on same day, and went through withdrawal bleeding of 3days, any chances of pregnancy?