Am I pregnant?

On the 5th of May I had sex and on the 6th I took plan B & then on the 10th I had sex and the condom broke so I took plan B again on the 11th. On the 13th of May I started bleeding (unsure if it's because plan B or it is implantation bleeding) it lasted four days until the 16th it was a rather normal flow. For the past week or two I've been experiencing headaches, breast pain, sore neck, cramps and heavy discharge I am unsure if I am pregnant but I am paranoid incase I am!! What do you all think? Do yous think AF is coming ?