clomid questions

Katie
My doc prescribed clomid and told me to take 100 mg starting next month, but my Husband and I have only been trying for 7 months. Is it too soon for clomid?? I'm 29 and hubby is 31. 
Also-- I am pretty confident that I do ovulate regularly on my own. I'm confused because I thought clomid helped women ovulate? Will it hurt me if I take it but I can already ovulate my own? 
Anyone have positive experience with clomid?