Losing weight while pregnant???

I need some advice. I will be 7 weeks pregnant tomorrow. I have gained 8 lbs in this 7 weeks, which i know is not normal. I went through IVF to get pregnant and prior to this transfer, I had lost 40 lbs to get down to 203 by doing 75 hard. After stopping 75 hard I got back up to 210, just regular diet and exercise. I am now back up to 218 and I am starting to see it in my face, but I feel like it is to early to blame the weight gain and facial change on pregnancy. I want to eat healthier, without really limiting myself because I don't want to risk hurting anything with this pregnancy. I also am not sure what kind of exercises I can do?? Any advice is appreciated!!!