Yes, hon. That's what my FS and my OB/GP told me to take. The Megafol is just a bumper amount of Folate which is important at 'our age' apparently. I think a lot of the girls on here take it.
If you're using donor eggs though (I'm sorry, I can't remember if you are using DE or OE) then you may not need the Megafol. I'd recommend asking about both when you chat to your FN.
Am feeling VERY excited for you hon Good luck with your BT results