We have this three in our garden- I don't know what it's called- and I've been pricked by one of its b*stard thorny branches and now have a very painful finger. I'm surprised by how painful and swollen my finger is as a result- should I be worried? I can't use my finger properly and warm water on it feels like scorching. There's a bit of the thorn left in my finger but trying to get it out last night pushed it further in.