Clomid confusion.....help?

Hi all. My husband and I have been trying to conceive for nearly 2 years. I have had irregular/ absent periods for as long as I can remember, and got diagnosed about 6months ago with pcos
My doctor prescribed a drug to induce a period, (which worked, it was horrific, but it worked) and I got instructed 2 days into the bleed to start the clomid 50mg. I followed all the instructions, I bled for about 12 days, and I've had nothing since.
Sadly I couldn't attend my blood test to check for ovulation as it was my brothers wedding and I simply couldn't get away. Technically now my expected period is a week late. I've taken one of those early response pregnancy tests which was negative. So now I don't know when, or even if I should take the clomid again? Has anyone experienced anything similar?