Late or no ovulation at all?

s🦖

So last month was our first month TTC and I didn’t get pregnant even though we had sex during ovulation. I took an ovulation test last month and it was positive, I had egg white cervical mucus, the whole nine. My cycles are always 36 days. Last month I ovulated on day 21. I’m on day 21 now and I haven’t gotten a positive ovulation test yet. It’s close according to ovulation tests and I have a little egg white mucus but not as much as last month. Is it possible that I’m going to ovulate late or could there be months when you don’t ovulate at all? Even if your period is regular? I know it’s only our second month trying but it’s confusing and frustrating. I’m overweight, 5’5” 210. I was excited that despite this I was hopefully ovulating regularly...