Pregnant and divorcing

Posting Anon because women in my area have this app. I'm trying to get advice without drama.

I was leaving after income tax anyway- I was waiting so he would have money for a new place for him and his daughter ( that I've been raising since she was 3). I simply can not do this anymore... We struggled with ttc for almost 2 years. As grateful as I am to be pregnant, it was a complete shock.

I'm tired of feeling like he married me to be a full time nanny to his daughter. There's nothing between us unless we are in the face of a crisis and that's because I give everything I have in me and he just takes and takes more.

I'm so disappointed that this is how this turned out. Was I that blind? Am I stupid? What am I supposed to do now? I'm tied to this man who I feel has always treated me as a convenience. Will the child we have together be the same?

Please believe that I've tried several different ways of talking to him and getting him to understand why I feel what I do... He tries to tell me I'm irrational ( even prior to pregnancy) or makes a joke out of it. The times he has taken me seriously, it lasts for maybe a week and then we are back to me doing EVERYTHING.

Ladies, please help. Where do I go from here? Am I strong enough? Am I making a mistake?