Trying to lose weight while pregnant?

Kara • Married 05/16/15
I have a question on losing weight while pregnant. I'm 5'3" and 215 lbs so I'm a big girl. I've been trying to lose weight and have lost 8 lbs since Jan 7th. Today I just found out I am 4 weeks 6 days along. I'm trying to lose wigjt the healthy way through weight watchers. My MD told me before I was pregnant I needed to lose weight to avoid complications. Should I stop trying to lose or keep going and be healthy and sensible about it??