Just sat in bed and felt a little tickle on my arm, went to grab it and it jumped like I've never seen something jump before! Caught it again and tried to squash it and it wouldn't die
just managed to grab it in a piece of tissue and it was defo a flea 
We have no pets and my house is clean and tidy. Wtf? Do I have to go round looking for where it came from or could it have just come in on my clothes?