what do you ladies think?

Hi all! A little bit about me: I'm 33 and have two little girls ages 8 and 10. Before I had my kiddos I had five miscarriages all around 10 weeks. Then two healthy baby's and I haven't been pregnant sense, so that would be 8 years. I had a horrible marriage and I have finally got out of it. Met a wonderful man that I love dearly and we have been ttc for 7 months now and we have had no luck. My periods are always on time and regular and when I test ovulation I always get positives, except this month. No surge at all! Back in the day it seemed I got pregnant every time my ex looked at me and now nothing! I don't get it! What's going on? Any ideas? My SO is 40 and he has never had kids but he has never tried with anyone ether so I don't know 😕. Thanks for listening. Baby dust to all you beautiful ladies out there.