your experience with fertility drugs

Hello. So I've been prescribed metformin, femara/letrozole, and trigger shot to conceive. 
Currently I'm taking provera to start my period then I should start the femara then once I have my ultrasound i take the trigger shot.
My question is has anyone ever been through this? I've never done it and I'm curious about the success rate as well as the things the meds put you through.