Let's talk weight gain. Ladies, how we feeling?

Ta

So for background I started this pregnancy slightly underweight with a 17.5 BMI at 113lbs. I am 5'6" and have always been part of the itty bitty titty committee and not much of a badonk. My husband has encouraged me to EAT this entire pregnancy, and I have. I eat mostly whole foods, maybe getting fast food once every week. I snack on raw fruits and veggies, pretzels, and other healthy foods. Prior to pregnancy I would struggle to eat more than 1500 calories. After my last OB appointment I am feeling so ashamed. I am 23 weeks and I've already gained the recommended 40lbs. She advised that I need to slow down on the weight gain considering the biggest growth is yet to come. This is my first pregnancy, but I feel all the weight gain is in my boobs and butt. My wedding rings still fit fine. I was just diagnosed with placenta previa so my activity is limited but I still try and do at least 20-30 minutes of light exercise and cycling every day. My bloodwork has come back perfect with just a slight anemia (Ive always had) and my blood pressure was 100/70 last time measured. I'm trying hard to not calorie count, but I am feeling guilty about how much I have gained.