what should i do!

I know my boyfriend since 13 years ago we used to mess around since high school but nothing serious in september 2014 we started talking but he had a 7 month baby and he told me he wasnt wt the mother and he was waiting for her to go to her moms house to live, we moved out together on february 2015 and march of the same month he cheated on me with her he cheated on me that whole year wt her and we were off and on twice so on last christmas he gave me a ring 8 months later she started to send me stupid texts but he never saw her or cheat i just got tired of that situation(on july 2016)  im back wt him for the last time and he said that he is serious now and want is to get marry and have a family we started trying since last month but now i dont know if i should get pregnant or not help!