Clomid help!

So me and my fiancee have been ttc for 2 and a half years, I have pcos, but all other tests are normal. First month of taking clomid and af still hasn't shown up, 8 days late for af now. I've taken 10 tests all negative. It's driving me insane. Is this normal for Clomid? Should I go the doctors and get a blood test?