Baby weight gain

Te

I’m 157lbs (and I’m 5’6 tall) I was 143 around the time I found out I was pregnant. I’m only at 10 weeks I feel like I’m going up quickly is that normal? When I gave birth to my first baby I was about 170-175lbs and 123lbs before that pregnancy. I asked my dr if I can go back to the gym but she said not to lift anything higher than 10lbs and I should do yoga instead.