Idk what to do 😞

I just found out I'm pregnant (5 weeks) and I'm definitely on the heavy side at 240lbs. My doctor said my weight can potentially cause some issues with my pregnancy down the road and he's not sure if it's best I carry right now. Has anyone dealt with this? I'm not sure what to do. I have no other health issues besides being overweight, which has just happened in the last year.

Is it possible to effectively lose weight while pregnant without hurting the baby?