Ovulating late?

Danielle
I have been off my BC for 4 months now and my cycles are not completely regular yet (my cycles last anywhere from 30-39 days). AF is due to arrive on Thursday, I've been doing ovulation tests (this is my first month) and got my first positive this past Saturday. My question is can I really be ovulating that late into my cycle? I'm starting to get worried that if I actually do ovulate late I won't be able to conceive. 
My SO thinks I'm going crazy and tells me to just relax, which only frustrates me more 😤