Is there even a chance?

My husband recently told me he wanted to try for a baby. Of course I am over the moon about this. The first time we started trying was the 21st with a 15% chance. It’s a pretty high number which gives me hope. We also tried on the 22nd but he didn’t get to “finish” because work called him in. My husband is in the military and found out he is going on a detachment for about a month. So the 21st was our only chance this month. We are really hoping it works out because we are taking leave to go see my family & it would be the perfect time to tell them, since we don’t see our families much. I want honest answers will this month be our month or will we have to wait till he gets back! Thank you guys so much for all the help!