What to do

So I had 2 miscarriages in the past 2 months. So I'm thinking about talking to my fiance and tell him either im going to get on birth control or we use condoms because I can't do another loss like that again. I don't know what he's going to say he's 55 im 30 and he's use to having his way with me I just hope he understands. What are you all opinions?