Does invisalign hurtt?

i am thinking about getting invisalign because i got an expander in 4th grade and braces in 5th and a retainer untill that summer... my teeth are still pretty crooked and make my smile lopsided... its not very bad at first look they look straight but after a while you can tell the bottom of my teeth slighty stick out and tilt away from eachother it is not bad tho... i was wondering if invisalign hurts very bad compared to braces an expander cuz i dont think anything hurt as bad as that expander hahah i ust dont wanna go through that again and i look sucky with braces soo what do u think hurts worse and how bad does it hurtt!!!