I also have problems with left and right. I know which is which but if I'm put under pressure I can mix them up. Plus I mix them up irregularly so it's not a sure thing to do opposite as I say. I can even point one way and say the other.
This is a thing Mr. Fatale really likes (*sarcasm*) when we're driving. Especially when we're in my hometown, which has quite busy traffic and I'm supposed to give directions since I know the town. He always makes sure to ask me way ahead so I can change my mind and point correctly.