found this weird scracth on my back... but didnt think anything of it... until i actually felt it...

I usually brush off scratches that I find on my body because I have a very blanket persistent pooch who loves pulling the covers off my shoulders to get under covers. However usually she leaves a straight scratch always on my shoulder. My friend told me she saw the scratch a few days ago but I didn't really think anything of it until I itched it today. I wish I would have felt it sooner because its curved perfectly way up in the middle of my back near my shoulders. However unfortunately it is healing so it is hard to see. It is in the shape of a crescent but backwards facing ) instead of (.
I edited the picture so you could see that the part I edited is way different then the actual scratch mark.

If you could give me some feedback, it would be really helpful. for those who don't know what I have been going through, I have been battling an unknown force in my home. whatever it is, I don't think it likes the fact that I know it is here and that I want it to leave...