Pain during sex

Ladies, what is going on?

My husband and I have been together for almost 7 years and sex has never hurt.

I always lubricate naturally and still do, but the last 2 nights it really hurts to penetrate. And then when inside it feels like he is stabbing my stomach.

I just want to enjoy sex, we have been trying to concieve for 10 months. I ovulated 8 days ago for the first time, is this hormones?