I wish we tried this weekend

Hi there everyone- My husband is currently on a mission with the army so he’s halfway across the US from home & me for the year. We’ve only seen each other about 4 times during his time away and he finally comes home at the end of November. I was able to see him this weekend and we didn’t fully take advantage of trying to try. He was feeling a bit sick as his allergies hit him like a truck and we were just exhausted from traveling and drinking/eating. I realized today that I’m ovulating and I just wish we had thought the process over a bit. Since he’s away, I didn’t want to be pregnant while I’m on my own, and I recently got diagnosed with celiac so I’m on a mission to go gluten free but I just feel so guilty. I’m nervous I won’t be able to get pregnant easily and now we messed up.