RUN!
Ok, you're trying to be cheeky. You take the right corner again, which leads to another tight alleyway. The thing won't suspect you take such an unconventional escape! As you squeeze yourself through the alley. You notice that if you take to the right again, it would lead to the front door of your house again. Maybe the beast hasn't caught on and you can lock yourself in at the safety of your own room while calling for literally ANYONE to help? Or you can go to the left that leads out to the streets. You can hear crowds of people and heavy traffic, maybe you can lose the thing more by hiding there?