Kinda hurt, am i expecting too much!?

I am a bit frustrated. SO and I have been together for 3 years and decided to start trying to a baby of our own. (I have 3 from previous marriage) Turns out I am pregnant!! First month trying...and SO doesn't think its real?????? He says "oh that line you can barely see, yea ok" all sarcastic and he never asks how I'm doing or feeling. All I hear is "are you bleeding yet" "get your period yet?" He has 2 kids from a previous relationship so kids are not new to him. Why is he acting like this!? Did he not really want the baby?! I'm too emotional for this...