Name Change For Pregnant Transman

I am expecting my first child in August of 2019. I have identified as male since the age of 14 but have not had the chance to go through with any legal transitioning. The pregnancy has obviously been a huge source lf dysphoria for me, and was not planned, but nonetheless we are thrilled for our baby girl. My biggest issue now is that my name is still legally my birthname, and I do not want that name on any of my daughters paperwork. My boyfriend and I are struggling financially right now, as I am to pregnant to be able to find or keep a job and he is focusing mainly on school for the next month or so, so we are asking for some help to be able to afford the legal name change.