Weight gain ๐Ÿ˜’

Erika
So, I'm 29+5 and have already gained nearly 45 lbs since I got pregnant. I started at 138 and am now at 183 or more. I have rapidly put on weight and I don't understand why. I mean, of course, I'm pregnant but I seriously am not eating any differently than before I got pregnant. I weighed 2 weeks ago & I was at 173, now I'm 183. 10 pounds in 2 weeks!! I eat as healthy as I can, although, I do enjoy sweets. I walk everyday and even go to the gym sometimes. I'm healthy, I haven't had any issues during pregnancy, no previous weight issues, I passed my glucose test, and I drink a lot of water. I just don't understand and I'm worried about it. I talked to my doctor & she just told me to watch what I eat & to be healthier, so I did. But I'm still putting on almost a pound a day! Anyone else having this issue? ๐Ÿ˜•ย 
I definitely won't be dieting, but I seriously don't want to gain anymore!