I would agree w/ PP's... give the met a little more time and start TTC now but chart so you have something to show your Dr. when you go back.
Keep up w/ the WL goals and when you do go back to see her just let her know you're doing the best you can. The Met (given time) may help you get the last 10lbs off. (as will the increased BDing!

)
Also as the PP said - if after that she's not on board w/ your plans, find a new Dr!!
GL!