You have the right form, but you fall under category H ("other basis of eligibility"). The USCIS advises,
Quote Quoting Other basis of eligibility.
If you are not included in the above categories, but believe you may be eligible for adjustment or creation of record of permanent residence, contact our National Customer Service Center at 1-800-375-5283 for information on how to use InfoPass on our internet website (www.uscis.gov). InfoPass can help you make an appointment at your local USCIS office concerning your possible eligibilty.
Do not leave the country until this is resolved, as you may find that you are both unable to return and subject to a period of exclusion.