spotting on clomid day 13??

Hi I am spotting a tiny bit and Im on cd13. i first noticed it yesterday but didnt think much of it but I noticed it today when I went to the bathroom. Its very minimal (less than when i spot before my period) and it has been super light tan but today there was a dot of light pink. I do have a 1cm fibroid that was discovered before taking clomid (im on my third round) and i have no cramping or feel different. My period was normal. Should I call the doctor or not worry at this point unless it continues or worsens? Im just worried this will interfere with ovulation since it usually happens on cd17/18. Thanks for your advice!