Girls, help with my pregnant girlfriend?

Well my girlfriend is now 22 weeks pregnant and for about... 10 weeks now all she has done is start arguments, been nasty or push me away from her. We live together and obviously sleep together and all I do is try my 100% best to get everything right so she knows I'm always there for her. I comfort her I complement her when she says she's looking fat I try cuddle up to her in bed and always do my best to make sure she wakes up happy and goes sleep happy I buy her gifts and she hates me doing it and doesn't even say thanks for anything I get u till I have to say what do you say?

I live 2 hours away from my parents house with her and wen it comes to seeing her parents we stay down there for a week and when it comes to my house with my parents she always lies and makes up things to go home. I hate the girl she has become and I don't know what to do about it.
Girls, help with my pregnant girlfriend?
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