Weight gain???

I literally wanted to bust out crying at my appointment yesterday. I have gained 4 pounds in a month and I just got into my second trimester. With my two other pregnancies I always lost weight up until the last trimester and they were both boys. I don't know if it's because I'm having a girl this time or if it's because I work 3rd shift and exhaustion kicked my ass last trimester and I was always sleeping but damn I was definitely upset. Btw I'm already a big girl 257 pre pregnancy 261 yesterday.