Fleas😭😭😭😭😭😭😭😭

I’m pretty sure my baby bear has fleas. I was hanging out w him and saw a small black speck on his face then I went to inspect it and realised it was a bug so I tried to pull it out of his fur but then it got away. Then I started frantically searching around his fur and saw it again (idk if it’s a same one or another one)

Anyways I have a vet booked for 11am tmrw (it’s currently 7pm now). Is there anything I should do before the appointment? He’s acting completely normal otherwise he’s not even really scratching more than usual.

Ugh I’m so worried. What is flea treatment usually like for buns? I’m literally going away for a whole month in 3 days for an unavoidable family reason (this is the first time I’m leaving my rabbits for so long) and I’m already so worried…now this.

Please if anyone can give me some advice I’d really appreciate it