I need some opinions

Malisha
Ok need opinions my dr has been giving some pills to help regulate my periods ok so I had my period a few days after taking them which would be on sep 20th then she also wants  me to test 21 days from when my period starts to see if I'm ovulating well on the 3rd I was spotting a lil heavy for 2 days at first it was brown then turned pink and then a lil red do I count that as a period?? That has never happened before should I still go get blood work done on the 11th which is 21 days from the 20th of sep or what?? Sorry if that's confusing.