First time clomid user

Hi there.  This is my first post.  I have PCOS and am trying for my second child and have been trying for over a year.  I was actually diagnosed with PCOS at age 15 and went on birth control pills to regulate my period.  Surprisingly I got pregnant right away with my daughter who will be 4 next month.  However this time around hasn't been that successful.  I don't get my periods on my own so I've taken provera to start my period.  It was just confirmed again that I have PCOS and was prescribed provera again and my first dose of Clomid 100mg.  Has anyone had success on Clomid and has anyone had any side affects using it?  I'm defintely hopeful that I'm heading in the right direction with using Clomid :-)