Was Just Prescribed Clomid!

Was just prescribed Clomid after ttc for 18 months... I am 23 yrs old, and I Do ovulate on my own, just haven't been able to get pregnant.  My hubby has had a SA and it came back fine, and he has also fathered two children.  I am supposed to take it CD5-9, so now I am just waiting for AF to show up!... I have had my hormones checked and everything came back normal, so hopefully Clomid will just help us along!!! Anything I may need to know prior to actually taking clomid or while taking it will be appreciated!