So I had sex with my boyfriend March 14th and the condom broke and although he pulled out it might have gotten on the outside of me so to be safe I cleaned myself inside and out with toilet paper. Next morning, I got my period. However I figured pregnancy is still possible so I took plan b one step which completely dissolved in my mouth before trying to swallow it whole. I had a normal period lasting until the 20th, however, it is now the 25th and I have had a little bit of spotting every day since then which I never experienced before. I have also been very tired and my stomach is a bit weaker than normal. I am fairly certain I'm not pregnant but these symptoms are freaking me out, does pregnancy seem likely? Is an implantation bleed possible directly after a period or is that more likely a side effect of plan b?