Clomid, have you used it? What results? I'm 40, hubby 41 TTC first

Belinda
We've been trying for 13mths & had a miscarriage 7mths ago with no luck in falling pregnant again. I finally went to see a doctor about it this week. There a bunch of tests I need to get done over the next fe, then providing they come back ok, the doctor said we'd try Clomid for a couple of mths. I'm wondering who's tried it & how successful has it been?