Op, firstly, huge on-line, virtual hugs and
for you.
Mis-matched libido is awful in any relationship, and can easily destroy it, but, I think there is more to it than that.
"My wife and I have been together for over 10 years. Have had several dry spells"
First red flag. Why do you think these happened?
"when I’ve been pregnant (twice) she’s refused to touch me at all as she said it was gross when I was pregnant"
Second red flag. That's simply not what you say to any pregnant woman, never mind your spouse!
"she refused and that was that"
Third red flag. Sorry, but three strikes, and you are out.
Forgive me, but it doesn't sound like this woman cares for you at all. How long have you been married?
I note that you have been pregnant twice - why didn't your wife carry?
I'm probably reading far too much into your post, but it sounds like she was using you as a baby momma, and now that she has her family, doesn't want anything more to do with you... I hope I'm wrong...
IMHO, you need at the minimum to talk to her. Others may suggest leaving her, but with (at least) one young child, that's going to be dificult. Do you have your own finances?