I've been working with my boyfriend thinking about a plan for when he gets ill. We're getting to the stage where things are pretty serious, and when we're both finished with uni we're going to move in together. We've planned to have a mutual friend who knows about my phobia who's willing to have him stay with them while he's sick.
As for children, a lot of mothers on here that I've read posts by say that it's easier for them to keep their anxiety under control when it's their own children. I'm not too sure if I'd feel that way, but when I think about it, it gives me some hope that being a mother will make things easier. I'm nowhere near that point yet though.
I know exactly how you feel though. My boyfriend has gastrointestinal issues at the moment. He's trying very hard to beat them but when he's sick, especially when he's v*ing, I just can't be around him, and his friend told me last night that it makes him really sad. He understands though, and it seems like you have an understanding boyfriend as well. You're not a bad person because it's completely out of your control. It's not your fault you have this phobia.
I hope that this helps and that you're okay. Xx