So Not Sure If My Period Is Late Because I

So not sure if my period is late because I don't really keep track of my cycle. I had it on the 14th of last month is all I know and it lasted 4 days But for the last four days I've had brown discharge. First light brown then , dark brown then pink and now back to dark brown. I've never had actual intercourse but there has been penis And Viginia contact. I also believe I'm constipated. I have a wacky sleep schedule and eat one meal a day and drink water