It depends on how sensitive your eyes are. I’ve seen many people wearing expired lenses without any issues. You’ll probably be all right if your eyes are not sensitive at all.
My son also wears contacts. Sometimes he didn’t realize that they’ve already been expired and he still wore them. It turns out nothing actually happens. But I would not recommend you take any risk, you are not supposed to wear expired lenses.
I wouldn’t. I used the expired lenses once and one broke in my eye literally, which scared me a lot. Thanks god it was not so bad so I got it out. But I will never wear those useless lens again.