I don't know if you want to hear this but personally since it's not that expensive I'd buy new shit, although usually you have at least a couple months leway with the exp dates. As it's been stored in the fridge it's probably fine, although I wouldn't try to use it too much longer.
It hasn't been opened already has it?
Also, be very careful when switching over to new insulin. Being just expired it might have lost some potency and when switching to new stuff I'd lower the doses and play it by ear. As long as it looks fine you should be ok for at least another month.
Hope that helps,
marx