I feel like a selfish asshole

It seems like my partner always has something wrong with him. His hand hurts, his arm hurts, he pulled a muscle, his back hurts. He calls off work a lot. And won't quit talking about whatever pain he is in. I'm exhausted, annoyed and sick of hearing about it. It's always something. Am I wrong for wishing I had picked someone healthier? I'm starting to get concerned that he won't help support his family (we have been TTC for the last 3 months) which is about how long I've noticed this pattern. He always wants to call off work, and im afraid of this continuing to where he won't be able to help take care of our child. I don't want to be with someone and still be a single mom.

Am I being inconsiderate? An asshole? Selfish?

I'm just frustrated lately with everything he does. He loves me to pieces and I love him, but I feel like this is a deal breaker for me.

I want a partner and a child...not 2 children...