Has anyone experienced irregular bleeding on Letrozole?

Whitney

I took 2.5mg a day on days 3-7. My period is typically about 5 days however after taking Letrozole my bleeding went on into day 7 and I have been spotting every day since then, today is CD10. I m going to call my doctor about this but thought I would post to see if anyone else has experienced this. I feel like I'm not going to ovulate if I'm still bleeding/spotting from my period?!