Why am I so slow?

Today I had my mom come back in. She is a class 5 and has a lot of restorations. I had a hard time getting around her old fillings with bad margins, and around the crowns with recession. I had a hard time detecting if there was calculus under the overhangs of her fillings, or if I was just hitting the overhangs?! Ah, I get so frusterated sometimes. I'm glad she's my mom and will come back with no problems. She said she likes to get off of work and come see me! I'm glad my patient is still happy, cause me... ahh! One day, I will be so good and so fast... hopefully!