Guilty for shouting at daughter?

Yesterday my 2 year old screamed the house down and woke up my 6 mth old bub that had had a rough night and was overtired, so I shouted at her and grabbed the front of her shirt while I was yelling, just to get the point across that I was mad. That night I felt horrible and still do today, even though I didn't smack or hurt her I feel terrible. I don't want her to be scared of me ever, any tips on a better way to deal with this? Counting to 10, walking away? I want her to know though that she is very for waking him.