Definitely no legs visible to the naked eye, and certainly not wriggly ones! It looked like a perfect circle almost like a sharpie mark. It just looked black which threw me but then on the picture it does actually look more blood coloured than black.
No real hole in the skin but more like a pinprick, like when you pick a spot or pull out an ingrown hair, but even smaller than that.
@DontMakeMeShushYou you have me worried again. I'll definitely be keeping an eye on any symptoms over the next few days/weeks.
How much have I messed up by destroying it rather than pulling out properly of it is a tick? I'm an idiot.