Metformin and Clomid combo?

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I have been TTC with my fiance for almost two years with no luck! I went to the DR in november and I was put on Clomid 50mg, and provera.

For two round it didnt work.

My Dr JUST put me on Metformin 500mg twice a day and Clomid 100mg days 1-5

On Metformin I have lost 12lbs so far (nine days)...and yesturday was my last dose of clomid. Has anyone had any success with the Met/Clomid Combo?????