Could I possibly be pregnant again ?!?

Zaria
Hello there, 
  So I was pregnant before in December and I got an abortion ( please don't judge me). My boyfriend and I had sex again and unfortunately he came inside of me again. (January)  As soon as I got home, maybe 2 hours later, I took a plan B. I know my period will definitely be off but I'm very precise with the timing and I've missed my period by 4 days now 😔. Do you think I'm pregnant again ?!?. Should I wait and just keep the baby? I need help!