Me and my boyfriend found out I was pregnant a week and three days ago, I should be overjoyed but am not due to an ex interfering saying the baby might be his. He is saying this because I had drunken sex with him on the 26th March. I came on my period that night and I still had the implanon in. I had it taken out on the 29th of March after having it in practically three years. I think there's no chance. But help?