I Took Letrozole For The Second Time (2x/day) On The

I took Letrozole for the second time (2x/day) on the 16th and was going to be checked for ovulation on Monday? It is so frustrating - I called the office on Friday to let them know that I was having brown staining all week and now darker and more and uncomfortable vaginally -dry irritated and they said it's no prob to wait until Monday when I just woke with red blood as if my period began????