After 4 month break. I’m back!

My husband and I tried for a while and I became, well, obsessed. I was drinking fertility tea, checking ovulation strips, talking about babies and sex 24/7. It started to take a toll on our marriage. He explained to me one night that he felt like a sperm donor, it broke my heart. So for him, I chose to take a break. Get back to making love and reconnecting. But now I’m back. I’m trying VERY hard to not obsess over getting pregnant. But it’s so freaking hard!!!!! My husband works nights, leaves for work at either 12pm/1am depends on the shift. So we basically only get to have sex on the days he’s off, two days a week. So since we’re not “forcing” it anymore. Etc only having sex twice a week, no tea, no strips, no legs in the air, no sex every other day during ovulation. I’m so scared that we’re not going to get pregnant. So I’ll finally get to the point. Do I have a chance of getting pregnant if we’re not doing the “active trying” and not sticking to a strict ovulation schedule? We currently have a 10 year old. He’s older than me (he’s 37 and I’m 31). We’re not getting younger. But I don’t want to make him feel like I just want his sperm. 🙁