Owww my torch coral stung me!!!

[Timbits]

I had a VERY tiny spot on my finger where the outer layer of skin was ripped off, not a deep cut or anything no blood. I don't know how but the tip of my torch manage to touch that spot perfectly and I felt a shock. I pulled my hand out of the water right away and continue feeling a stinging sensation. This was a few days ago now my finger is swollen and bruised when I touch that spot it feels bruised. I never got stung by corals before, is my finger going to be ok? I'm a little worried now... Thanks