Am I being selfish?

I'm going to try to keep this short.

My husband is active duty, and I am in the reserves. I was active duty but after my first contract I switched to the reserves. We have 2 year old son. We have been trying for baby #2, I need fertility treatment to conceive, so I have been drinking clomid for the past 3 months this month was the last month of it. If it doesn't work then we will have to do the injection and IUI. I've been hating the reserves for a while and been wanting to get out, but I can't. Anyways, recently I got told that I was selected to go to a deployment. I thought about it long and hard and talked to my husband about it. He told me he would support any decision I made. The only way to get out of this deployment is if I get pregnant, but I told him I wanted to go on the deployment, so that means stop the fertility treatment. I feel like I needed this opportunity. I think he feels a kind of way because he is going to be alone with my son and work too. I am worried about my son but we have plenty of family who I'm sure would help him if he needs the help. I also feel like my husband although says he supports any decision I made, he really didn't like my decision of stopping fertility and me wanting to go. Do you think i am being selfish? I feel like this deployment will help us tremendously financially and that I will be advancing in my career. I finally have some motivation to accomplish something and also will have a deployment under my belt before I get out of the military.