Blow jobs

My husband is always begging for blow jobs. I give them to him but I'm always gagging. It wasn't so bad till I got pregnant, and anything and everything that touches my tongue makes me sick. I do everything other thing he wants to do. But not being able to give him blow jobs makes me feel bad. Like I'm neglecting his needs. Idk what to do. Keep giving them and end up throwing up on him?

I have told him but he just doesn't get it. He says he like watching me gag and how my eyes water up when I do.