Hi there!
How long have you been taking the Metformin? Depending on the length, I'd give it a couple of more months to fully get in your system if you haven't been on it that long. It never worked for me & neither did the Metformin/Clomid combintation, either. There is an increased risk of multiples (twins, triplets, etc) with Infertility medications. A friend of mine conceived triplets (all girls; gave birth last December) from Metformin & Clomid alone, lol. Another friend is 14 weeks pregnant with twins without the help of meds so it just depends really. No need to be too afraid

hehe
I highly suggest speaking to your Dr. about other medications or fertility treatments depending on the route you're ready/willing/wanting to go

Different things work for different people! Sometimes Metformin works great for people, other times it does nothing. The same goes for Clomid, Femara, and many others.
Good luck! I hope you find something that works for YOU! Just remember, none of us are alike so don't let your Dr. make you feel that way, either!