advice please...

my now ex and i are having a baby together.. when we first met he told me he was petty. When he gets mad at me or i say something he does not like. He will just not respond to me for. weeks or months. I wont know i upset him cause he wont say anything or respond. I am half way through my pregnancy and we have not spoken most of the pregnancy. Normally i dont care about shit like that. But i am not sure if its me or my pregnancy hormones but the fact that he has done that shit most of my pregnancy it has piss me really bad. I am mad to a point where i think about not telling him when i go in to labor. Just text him after i get out of the hospital or choose the babies name on my own ( which i told him i would let him decided). I am normally not this cold but i am annoyed and pissed. On top of that he has a job offer and is supposed to leave in Oct. And i have asked him several time are you taking the job or not which to job is across the map California i am in Va. And he still says hes not sure but i am due in dec. I feel like he should let me know in advance so i know if i will have help or not. He is boiling my blood to a point i feel like i am going to eventually go off. I just hate not having answers. And yes i could just set my mind to doing everything on my own but once i set my mind to that. I will not want him in my way or voicing his opinion cause i dont like back and forth. I am a planner. Am i over reactting? .. i am happy i could vent .. But any advice???