I have PCOS and Clomid did wonders for me. I highly HIGHLY recommend charting your BBT while using Clomid. It takes the guess work out of when you've ovulated. I used FertilityFriend.com, but there's other charting sites out there like TCOYF.com (Taking Charge of Your Fertility).
I've gotten pregnant twice on Clomid in a 7 month period, with the first pregnancy being a mc.
Checking my CM and CP, testing with OPKs, using PreSeed, and charting my BBT got us our sticky rainbow!
Also, NEVER get Clomid unless your under your doctor's supervision. If you shouldn't be taking clomid or if you overdose it can cause ovary hyperstimulation to the point where you can lose one or both ovaries. Doctor's watch for these things. NEVER take it on your own!
AFM, my side effects were hot flashes, mood swings, ovary sensations where I really felt my ovaries working hard, and headaches. These all started for my a day or so after the last dose. If your ovaries are causing you sharp, unbearable pain, then it's time to see the doc. Other than that be prepared to feel them work on overdrive, just how they're supposed to on Clomid!
I documented my last two Clomid cycles (inclusive of side effects, OPKs and HPTs) in my "Journey to Our Rainbow Pregnancy" journal. Feel free to take a look