Opinions on phentermine (apidex) please!!!

Carol
My dr gave me a script for phentermine. I have pcos and hypothyroidism. I take metformin and synthroid. Have any of you ladies had success or priblems with this weight loss pill? I filled the script last month but I'm nervous to take it since we have been ttc for 4 years. Tried clomid and femara... I'm at my whitts end and feeling hopeless. I believe weight may be part of my issue. Please tell me what you think! Thanks!! I'm open to any and all advice.