Oh yes you will need to chat to your doctor as it can have some crap side effects, but it is awesome.
I do hope that you acheive what you want. I have been so comfortable with this pregnancy and with my weight this time around. I have had no nasty encounters yet with medical staff but I'm sure I will be better equiped to handle it this time around if I do.
If you ever want to chat I'm more than happy to.