Ummm... what's going on?

So, my period just stopped today. It started 2 days ago, and now nothing. Not even spotting.

I'm a bit worried because usually my period lasts 8 or so days and is a medium-heavy flow, so I have no idea as to what's going on. Did it just slow down a lot, or is something wrong?

Idk if this is relevant, but I'm not sexually active, I'm not on any birth control, and I'm type 1 diabetic. So what could be affecting my period??