I really want a five pound baby

I’ll be 33 weeks Monday and as of now baby weighs 3 pounds 14 ounces. It seems like every month I go to an appointment she’s up one pound and I hope she doesn’t start gaining extra weight between now and my due date. I was 5 pounds and my boyfriend was 6 pounds so somewhere between there I would be fine. She’s also head down and I’m having a lot of pelvic pressure, at times it hard to move. I had a busy day yesterday and by the time I got home in the night my lower half (lower back and pelvis region) was on fire, even sitting hurt.