1st clomid - 150mg?

Julie
Ok so I am supposed to start clomid today and my doc has given me 150mg? I'm kinda worried about starting out on such a high dose. I ovulate on my own most months but he wants to focus on maturing my eggs as my partner has low sperm count and we need all the help we can get. I'm scared of triplets and ectopic pregnancies truth be told! 
​Anyone have any experience with going straight to 150mg? Any success stories?