One day you're walking with your two friends, John and Thomas, in the woods out of boredom, suddenly something grabs you from behind, wraps tentacles around you and practically tackles you to the ground, as you lay there the thing on your back suddenly slashes the back of your shirt and slashes your bare back, as it bleeds you feel something gooey and small crawl into the wound, into your skin and into your body, then the thing that tackled you got up off you and ran off

Now what?