for some people, clomid and metformin will help, but for others (like me) they don't work, and you need to move to other forms of treatment

given that your wife has been put on metformin, i would assume that your wife has polycystic ovaries - and for a lot of people with PCOS, it can be hard to conceive.

trust in your doctor to guide you. there is no guarantee any of it will work - but try everything that they suggest to optimise your chances of having a baby