Best friend trying to get pg.

Tyler
So my best friend has been trying to get pregnant since oct.. shes spot on for her period every month, tracks ovulation ect. Most months she will spot for 2 days and then start. Some months she doesnt though. Anyways shes never been late. Shes not stressed about it at all she says shes just trying to go the calm route. Anyways so she was supposed to start today. She text this morning and said she was spoting so normally an hour later shes on full flow. She text just now and said it never came. She took a test but said neg. Wondering if anyone else experianced this and ended up getting a pos. Its like brown spotting btw. Tia!