I did a similar thing in January. Merrily chopping away at an onion, distracted by my phone, when I realised that the knife was red.... taken a large chunk from my forefinger of my left hand at the join where it bends at the top, the first time I’ve ever cut myself! 2 days before a big private party..... it bled for 24 hours... it bled during the gig, took ages to heal!
Take plenty of plasters and a cloth. It’ll smart a bit but you’ll be fine when you are playing😃