What’s going on with my period?

I’ve had my period for almost 10 years now, usually it comes for 5 to 7 days and it’s abundant. On February I started using the depo-provera shot and everything has been completely normal until now.

My period came on monday and was already gone by Tuesday night, the blood was super dark and poor compared to every single of my periods.

Should I be worried? Or is it normal?