had sex on the 24th of December 2016 which was two days after my period, the first round was with a condom the second round was without but he claimed to not have ejuculated in me so i took a plan B 8 hours after intercourse. Him and i had sex again on the 7th of January 2017 unprotected but he came on the bed but i am still paranoid so i took plan B again 7 hours after intercourse.. so which means i have used Plan B method twice in two weeks. I took a spot on pregmancy test on the 29th of Decmeber 2016 and it was negative.. could i pregnant this time around