Like everyone else said, just go get the shot.
A bat isn't like a spider or a mosquito. It has lived in your house for who knows how long. When a bat bites you, it's not gonna swell up and itch like a spider or a mosquito. Your gonna wake up with two pin pricks on your ankle or something and totally miss it. Or it'll salavate on your toothbrush or take a nibble out of an apple on your counter.
The shot will either be covered by Medicaid or any insurance or your government if you're not American.
If you want any help or information please reach out. I have plenty of generic advice (since I don't know where you live) and I'll help you in any way I can remotely.
If you want to be scared into it, just look up anything about rabies. It's literally the scariest disease I've ever seen. No cure, no treatment, going crazy, the whole shebang. It can also live in your body for years before it hits. And the vaccine works at any time before symptoms hit.
Very pretty