Hi I'm on my period right now n have been for 2 or 3 days n I'm having nothing but brown blood n I've never been having this

It's common and normal. It's just 'old' - meaning exposed to air, which turns it brown.

Yes very, very normal. Menstrual blood is not the same as the kind of blood from a cut. It can be clotty, stringy, brown, and red.