Dude your doing what every new grower does....and its not good. it's ok to grab a sample bud. but keep in mind one thing.
when you pick a lower bud all of a sudden the plant focuses well needed energy to the wounded area and not where it should go...to bud production.
So whenever you get the need to try it...think about the end product.
but a sample bud to help ya check personal readiness once or twice is not that harmful. but just treat her like a lady.