Seeking advice on creaky bottom bracket
So riding my old road bike the other day I noticed that the bottom bracket was creaking a tiny bit. Stopping to check things out there was a little side to side movement in the cranks. I took it home and promptly didn't ride it for the rest of the week, using my backup bike for commuting. I haven't had the time to look into getting a new BB for it yet but I was hoping to go to a small introductory road riding course tomorrow morning with the bike. My question is: is it alright to ride a bike with a slightly creaky BB, or should I hold off until I get it fixed?