You'll be fine. Get back on track and stay there and with all the walking and dancing I bet you'll barely notice any stall. My tip for festival and street food though: there's usually a hog roast doing baguettes - which have quite a lot of meat in big chunks in them which you can pick out easily. And you'll know it's just meat, not processed and messed around with. Though as processed and messed around with goes, grabbing a burger and ditching the bun, or even a hot dog (will be carbier but not deadly) are always options.