Okay I'm super confused

i thought i might be starting my period 9 days early, i had brown spotting when i wiped for 2 days while i was nauseous for those 2 days. there was one tiny stripe of pink too.. it's now the day after & I'm not nauseous, I'm having no cramps or back aches & no spotting.. period due in 7 dayss.. has anyone had this before? what is it?