Is it normal to have a period a week after a previous one? Please reply too x

I started a period about a week and three days ago and today I started again, it’s brown so I don’t know if it’ll just be old blood but I’ve been having cramps all day. I set today ad my start day on <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> and it says I’ll end in three days anyone help??

Vote below to see results!