Distant husband?

I'm so confused.. My husband is giving me mixed signals about ttc. At first he was excited about our decision to expand our family. We've tried for 3 yrs, before we decided to see our doctors. That's when we found out that I have PCOS. Ever since we found out, I've been eating better and exercising. Now when I bring up the topic, he acts like he doesn't care. Please help me? I don't know what to think.... I feel like I want this more than he does....