I know how you feel. I have a 41/2 mth old yorkie that weighs 1.10lbs. When ever I sit on the couch she wants up there with me and I have to remember to put her down when I get up or she will jump. She has NO fear
If the door bell rings I have to put her down or she will jump. She jumped one and was limping. Within an hour she was fine thank goodness. She worries me to death. I have 2 other yorkies around 4 lbs. and they can jump, but they seem so big compared to her. I still worry about them too.