Mouse Anxiety

This looks like a cute picture of mouse right? Well, just like Britney Spears it's not that innocent. Let me backtrack a little.......
So, a few days ago at the wee hours of 4:30 in the morning I was awoken by a terrible, terrible sound.  Half asleep I was thinking why in the world is my angel of cat Finnegan playing with his toys?  So I grabbed my phone and turned on the flashlight to tell Finny to pipe down and then I saw the most horrendous, most disturbing thing. There was a MOUSE in Finnegans mouth!!!! Sheer panick set in.  First of all how the hell did a mouse get in my room?! second, I can never get that terrible sound out of my head.  I shudder every time I hear, think, or see anything related to a mouse.
Anyways, I had no idea what to do.  I ran out of bed into the next room and woke Joe up.  "Joe you need to get up NOW there is a mouse in my room!!" Joe, being the good brother in law that he is, immediately got up and went into my room to get rid of the thing.  Of course, my cat still had the mouse in his mouth and was not going to let that thing go.  So Joe went to go grab it out of Finnegan's mouth and bam......The mouse ran off into a corner in my room.  Yup, pretty much wanted to cry right there.  Joe told me that the mouse probably found a way out, but I have been haunted every night since.  I obsessively am checking my bed, floor, Fin's mouth for the little monster.  I even have had Joe check my room.  But, since there is no trace of it, I have not been able to sleep.  And I know this all sounds silly, but I get anxiety thinking about going to bed.  For the rest of that morning I slept on the couch.  And the last 2 nights I was in my room again. Tonight is a different story though, for some reason I'm getting really bad anxiety and decided that I'm going to sleep downstairs in the living room tonight.  Maybe I'll actually be able to get a good night's sleep!
Since I have the best mom in the world, she promised to help me clean my room hardcore tomorrow and investigate for a mouse.  Thank God for her right?
I feel like I have PTSD from the whole experience...
Oh AND I can never look at my cat the same..The image of the mouse hanging out of his mouth is tattooed in my brain.  #prayingforsleep