Last night I saw a hand or foot (couldn't tell which), stick out an inch or so from under my skin…

Last night I saw a hand or foot (couldn't tell which), stick out an inch or so from under my skin and it dragged along my tummy then disappeared. It was the most creepy wonderful thing I have ever seen. I have a little parasitic alien in there! I'm waiting for her bust out and start dancing and singing "Hello! Ma Baby" lol (if you get the movie reference...)