Having a panic! Drank a low alcohol beer...

I am looking for some reassurance... my husband bought me what we thought was an alcohol free beer to try. I drank it and as I was about to throw it away suddenly noticed it actually had an alcohol content of 0.5%. I am now freaking out that I've done damage as I'm only 10 weeks pregnant. And my husband feels terrible too. anyone got any reassurance for us?!?