No, you actually have to make the application for the waiver on the basis of showing extreme hardship to a US citizen spouse in order to see if you can qualify for a waiver of the 3/10 year bar to reentry and to get a visa to reenter. If you just turned 18 within the past 6 months, you may not be barred from reentry for 3/10 years but you would have to depart the US immediately and wait for the visa. You start accruing unlawful presence time only once you turn 18 but if it is fewer than 180 days since your 18th birthday, you would not be barred.
Answered on Jan 13th, 2012 at 7:48 PM