HELP!! CUT MY HAIR TOO SHORT NEED ADVICE!

Chloe • 22, Bisexual, Taken, Proud Cat Mom 😸💜 NOT TTC
I cut my boyfriends hair last night and it came out fine. I thought that maybe I'll try to give myself layers because I was bored of my hair. But I instead just cut a huge chunk off the length of my hair... I know, I know. Stupid move on my part. I can't afford a hairdresser right now.
I have an important event tomorrow (surprise party for my sister in a different state) and I need to look nice. I also start a new job on Monday. 
SO, should I just cut my hair shorter?! Or just leave it and let it grow out even though it looks horrendous?
For reference, I've had short hair before, but I've been growing it out but now idk what to do. I want long hair again. 😢