My last period was april 12 had sex april 23 no condom and he did ejaculate inside. Went and got plan b 2 hours later. Butttt the plan b melted in my mouth a bit. Had unprotected sex again on the 28 using pullout method. Took plan b again the following day. On May 3 i had brown discharge that lasted about 10 days it is now june 3 and no period could i be pregnant? I have taken 2 home pregnancy tests and both negative.