I think I fucked my hand

Firstly, apologies for the English because I know almost absolutely nothing (I'm Brazilian) so I'm using reddit's automatic translation.

It's basically the title. I couldn't find any more space on my forearm, so, instead of "migrating" to the other arm (I'm left-handed), I decided to cut the back of my hand. My cuts are very superficial, cat scratches and occasionally a cut in the skin, but these were just scratches — maybe it helps to know that I'm VERY thin?

The problem is that I didn't feel anything too much while I was doing this, but afterwards, I tried to move my thumb and it felt a little "heavy", it was a little uncomfortable too. I felt some spasms and tingling in my palm, but not much.

I can't afford to go to a doctor, my parents don't know about it and the medical centers in my city are all too far away to go alone (I'm a minor).