what do you do to recover the shame? and your usual reaction?

I did something not wrong but a shameful action.

I greeted my friend happy birthday thinking that today is her birthday but sad to say it is not her birthday nor her birth month. The worst part is there are few people who heard me greeted her so those people who heard me also greeted her. and my friend said "Thank you?! but it is not even my birthday today but thank you"

whaaa... I was very ashamed of what happened. when she said it is not her birthday my face literally turned red and I was saying to myself next time I won't greet people... hahaha... I just want at that moment to disappear like a bubble...