Clomid first round!! Ahh!!

Hey all! I'm 25 and my husband is 29. We've been trying to conceive our 2nd for 8 months with no luck. I do have endometriosis and I was able to get my pregnant 1st try after having ablasion and D&C. I went to my OB last week to find out what's going on...i figured I would need a THIRD surgery....after labs I found out that I have hypothyroidism and my progesterone level was low after ovulation indicating I'm not ovulating good. My doctor has prescribed me Clomid 100mg for cycle day 3-7. I will start this next week sometime. Can anyone tell me any success stories with Clomid. I'm hoping to get twins but we have no family history.