Brown discharge instead of period? What is this? Help!

Hi ladies. Has anyone ever experienced this and what was it? TTC for 7 months now. Supposed to get period this past Wednesday (4 days ago) no period just light brown discharge. Didn't have any when wiped just a few streaks here or there on liner. Been happening for 3-4 days. Super super light, barely leaving a mark on a liner. But been having cramping. This happened last month to me but woke up 3 days later with full bright red period. But this month it did NOT happen. No period and now no discharge. Has this happened to anyone and what was it?

Thanks ladies!