What to do

5days left of the month and i haven’t had a period i had two times where I’m pretty sure it was implantation just a pink barely there discharge when i wiped them second was a brownish one only when i wiped haven’t had it since and i swear I’ve taken a test almost everyday but i only get a line an hour to hours later which i know is invalid i just don’t get it I’ve had my period the same time every month for a year i haven’t been stressed i feel kind of bloated peeing a lot more and eating is kind of off :(