Caffeine can make people jittery and cause fast and sometimes anbormal heart rhythms. It sounds like you should stay away from caffeine. Reasons to seek a doctor would be if you are having passing out or near passing out episodes, palpitations, or if there's a history of young people dying suddenly in your family.
The total duration of treatment depends on the complexity of the treatment and is generally comparable to that of traditional braces. Typically treatment can last between 9 and 18 months. During your consultation, your Invisalign Provider can provide you with more detailed information.
A single InvisalignÂ® aligner is typically used to create at most about .25mm of movement (roughly 1/100th of an inch) or about 2 degrees of rotation. So, the lead tooth dictates how many individual aligners will be needed. Of course, you probably don't have the capability to make this measurement.