20 & Trying To Conceive

Hey Everyone! I'm new to this!! So here's my story. I was on birth control the summer of my sophomore semester in college (Started In May 2016, ended in December 2016.) and I stopped around December 13, had my withdrawal bleed and all this. My boyfriend and I had sex right after my withdrawal bleed was over. Then twice so far this month. Both times unprotected. He didn't finish in me, but like I said it was unprotected. Any tips?