You should do whatever you wish,as no one can really give you a definitive answer.
The 'stuff',inside a sealed vial,won't go bad,but it may not be as effective as when it was in date.As far as i'm aware steroids can be used well past their
expiry date.The date just conforms with the law.
The problem is,if your gear is shit,then you will assume the reason it hasn't worked,is it was out of date,which is misleading.
Basically it's a spin of the roulette wheel.