I'm 22+1 with the same amount of weight gain. Trust me this is a really good amount. I had already gained about 7-10lbs at this point in my first pregnancy. As long as you're within the recommended range at the end of your pregnancy 25-35lbs for normal BMI and 15-25lbs for overweight, you shouldn't be worried about it. The weight always came on in spurts for me but this is a really promising start. At this point your uterus is about the size of a soccer ball with the baby, which accounts for a whole pound, plus all the fluid. Not to mention your placenta and all the extra blood volume. Not sure what the weight of all that stuff is at this point, but my dr. said I would lose 20lbs just having my first baby and I lost 15. I had a 6lb baby, so you would probably be closer to the 20lb mark if you have a 7-8 pounder. Despite the weight gain you could actually end up pretty close to your starting weight after the baby is born. That and your body changes. I remember like 6 weeks after I had her I went out and bought bigger jeans that fit me and by the time I returned to work I had already gone down a couple more sizes without any more weight loss, my body just kinda shrunk. It's all very scary but it does eventually go back to normal.