Last week, my boyfriend and I had sex using a condom. The condom broke and we noticed before he came although we are unsure if any precum came out. We immediately went to get plan b which I took about two hours after sex happened.

My period was supposed to start the day after we had sex but it did not. My periods already tend to be very irregular and I know this is a symptom of plan b as well.

Yesterday I started to bleed, but the color is very light. The flow began very heavy but is now extremely light.

Could this spotting be implantation bleeding or is it more likely a result of the plan b? Should I wait to worry until bleeding stops?

I already have a gyno appointment set up for Friday.