I had light pink spotting on 3/7. Then yesterday I had light dark brown spotting, enough for a liner. Today I used the bathroom, wiped and saw yellow cm. Glow had my period due for 3/8, while another app said 3/10. I am not having any symptoms. I had already urinated so I will have to wait until later on to take a test. What do you think? The yellow cm is what threw me off because it's unusual for me to have that when AF is due.