Phentermine & ttc

Does anyone take phentermine to help them lose weight? i have pcos and I'm currently ttc with baby #1. right now im taking metformin just finished my Clomid last week n took the novarel shot this morning. I need to lose some weight bc the dr says it will help me conceive but I've tried dieting n already working out and nothing has helped. My mom and friends take phentermine n it has helped them i just dont know how safe it is to take while trying to conceive have any of y'all taken it? If so how does it affect you?