I drank beer that expired 2 years ago,How dangerous is this?What is the worst thing that could happen?After how long can I know that I am COMPLETELY SAFE?

I drank beer that expired 2 years ago. It tasted horrible, but I never drink beer so I didn’t realize until my husband told me. Could I die from this? How long until I know I’m completely safe? I got really scared. How possible is it to die from drinking spoiled beer?