Really Need some Advice

We are trying to get pregnant but my husband schedule and mine are very different, he works away for a month and is home maybe a week then sometimes two months and so on its really hard to be on the same page when it comes to ovulation days. My question now is I got a positive ovulation test on my 12 day of my cycle but had sex on my 10th day of my cycle can I still get pregnant?
I don't know what to do anymore it's so hard to sync my ovulation days to when he is Home.