This looks very dangerous, sorry to say. My wife had a tiny cut in the palm of her hand when peeling an apple, and it got swollen like yours, she was directed to emergency dept of the hospital , the immediatly operated (cut open 2 inches in zig zag pattern), she ended up staying in hospital bed for 3 days! Watch out. I think it was called cangrene.
Oh noo... I'm sorry to hear that, I hope everything ended well. 🫂
I'm keeping an eye on my hand, so far it's not getting worse, but I'll go to the hospital again if anything happens.