My gf is 9wk pregnant. every since shes pregnant its been her way or the highway. Im sick of it. I am left out

I Love her and i am excited about the baby. The past few weeks has been hell and makes me relize how winey and immuture she is. I just dont know if we will work if she keeps acting like this. Im not just gonna give up of course iwant my baby to have the best life. She does stuff that she knows makes me mad and is like your stuck so get over it. Does anyone have any advice ?