Frustrated

My son's birthday is next week and I bought him this John Deere tractor power wheel. I stored it in the shed and told my husband to make sure he didn't let Reagan in the shed. Any guess at what happened while I was at work today? If you guessed he found it you're right, and instead of making something up my husband let him try it out. Usually if he finds presents that I've purchased for him for a later date I tell him it's for my class and he usually forgets about it. To make matters worse I have a habit of over reacting I made my husband feel awful after blowing up and now I feel awful for my actions. My dad use to say there's two thing in life #1 don't sweat the small stuff #2 it's all small stuff. I wish I was more easy going at times. I have improved alot but I still have a ways to go.