My cat was chasing a mouse in our room last night and she didn't get it. I just found it in the bathroom and my DH is at the gym!!!! The cat couldn't care less about right now. Ewwwww!!!!! I hate this feeling. Do cats only hunt at night? She caught another one a few weeks ago in the middle of the night.
Then he dropped it on the carpet and it scooted around. Yuck! Lucky me had to get it out! Kind of looked like a cricket...I think. Kind of didn't. 

Sorry you have a little furry visitator! Hoping it is the only one, too!