Ttc with clomid and metforman should I ask for change?

Pague
So this month makes 3 months of ttc with clomid 100mg and metforman. I was on just clomid for 2 years on off. Idk if I should request a different medicine to go with the metforman. Or keep trying with clomid. We have been ttc for going on 4 years. It's frustrating.