Going Off Clomid?

I've read that sometimes when women go off of Clomid, they begin ovulating on their own. Anyone know if there's any truth to this or had any experiences one way or the other? Clomid is not working for me. Doc gave me the option of doing 1 more round or being referred to a RE. I picked RE but I also already have the pills for another round so should I go ahead and take them or lay off while I'm waiting to get into a RE? Please help!! Advice would be much appreciated.