Nah the bacteria will be fine as it has but any critters will not like high nitrates for long, if you can afford it get a bottle of PRIME from seachem (most LFS should have it) it's not great to use it often but as a quick detox it will work just fine.
Start getting the sand out if you can, if you use a syphon and have the exit over a sieve or something you can save any life in your sand, if you can't afford new sand for a few days then just wait a few days, you have no real stock so don't worry about it to much.
Sorry to make you panic mate