What do I say/do?

My fiancé and I have been together for a around 16 months now and we just recently got engaged. Lately, I feel like he's been more sexual than usual and what'll happen is we will start making out and then he gets aggressive with it, which to an extent I don't mind, but then he'll pause and try and talk me into sex. I'll be honest I've said yes a couple times but now it feels like he thinks it's not a big deal. Like he will say "you didn't have a problem with it before" and I'm not sure how to feel about it. I don't know how to address it or if I even should, maybe I'm overreacting? I don't want things to be ruined between us.