Pregnancy Scare?

I took 2 plan b’s this month. Most recent one i took was last week. I started spotting on Sunday. I guess thats what the Plan B was supposed to do. Today I had sex with my boyfriend again lol. At first we used a condom, then we took it off and he came inside me. Now I don't know what to do because I'm not gonna take another Plan B, it's just going to keep messing up my cycle the more I take it. Even though I'm bleeding, is there a chance of pregnancy? I don't know if bleeding with Plan B would just be like bleeding on a normal period. I don't have a short cycle or anything so I wouldn't be ovulating early. I need some help please.