If I was told the wrong gender what can I do?

If I was told the wrong gender what can I do? I was told it was a girl. I have been asking from the beginning. They never seem to give me a straight answer. I never got a picture. They never seem sure. It's not in my medical records that I'm expecting a girl. I even did the first look test and still wasn't told the for sure sex of my baby. They still say girl but I have a strong feeling it's going to be a boy. I'm just worried because I don't have money like that and what I have received is all girl things and if it turns out I have a boy I am going to be very mad. I asked numerous times and they never made me feel certain. I was just wondering that if anything, what can I do if I end up not having the sex they constantly told me I was having. Also I asked for anything test to be sure and my request was ignore (probably for insurance reasons bc I have free care).