Anyone else struggling with rapid weight gain?

Short summary of my story and why im struggling... my normal pre baby and whole life weight was always 140-150 (I have a almost 3 yr old), I got up to 195 with my first baby and only got down to 185 after him then I got pregnant with my 2nd due in dec. I had bad hypermesis gravidarum (extreme morning sickness) the first five months of this pregnancy and lost 40 lbs, went down to 146.

Once I started feeling better and could eat again (about a month and a half ago) I have now gone up to 166 lbs and am really struggling with the rapid gain. i am NOT trying to be unrealistic nor obsessed with being super skinny while pregnant, i needed to start gaining.. but am worried I put 20 lbs on that fast. Its like I am so hungry now prob from all those months of not eating. My doctor wasnt concerned since I am still about 20 lbs under pre pregnancy but I really didnt want to get to my pre pregnancy weight since that was overweight to begin with. Hope someone can understand or if you have any words of advice or encouragement. I dont even eat a ton of very bad foods.. was hoping to give birth in dec around 175 lbs so the loss after would be more manageable than my first pregnancy... sigh. Thank you in advance I dont really have anyone to talk to about this