Re-joining?

My husband left the Army two months ago. He was a Captain in the Army Reserves. Since then, we have struggled financially. I'm a SAHM, and while he has a great day job, we have a high mortgage and a new car payment. We've tried to stay on a budget, but we can't make it work. We have another additional income each month, but could lose that. If we do, he said he would likely rejoin the military, as opposed to remortgaging the house.

I'm devastated. I can tell he is stressed and that he was having a hard time telling me this. I didn't react great. I was just so happy when he left. I hate the idea of him being deployed. We want another kiddo soon, and I get overwhelmed thinking of all the times he will be gone.

He says if he rejoins he may have to commit for x amount of time. I feel selfish for being upset. I should be grateful to have someone who cares so deeply about providing for their family. And I am, I really am. I just didn't miss the sacrifice.

Update: I offered to get a part time job. He said that was "ridiculous" and that I already have my hands full with two kids. We do have a third income, but it's not consistent, so we don't factor it in. Some months it's $200, some months it is $2000.