Requirements:

• Were under the age of 31 as of June 15, 2012;
• Came to the United States before reaching your 16th birthday; (this point is very very vague, you can argue that you originally came in fact before turning 16)
• Have continuously resided in the United States since June 15, 2007, up to the present time;
• Were physically present in the United States on June 15, 2012, and at the time of making your request for consideration of deferred action with USCIS;
• Entered without inspection before June 15, 2012, or your lawful immigration status expired as of June 15, 2012;
• Are currently in school, have graduated or obtained a certificate of completion from high school, have obtained a general education development (GED) certificate, or are an honorably discharged veteran of the Coast Guard or Armed Forces of the United States; and
• Have not been convicted of a felony, significant misdemeanor, three or more other misdemeanors, and do not otherwise pose a threat to national security or public safety.

I guess you can try. You can argue that you did in fact originally came to US before reaching your 16th birthday (if the "trip" was less than 3 months you can argue continuous presence since when you came while you were 12). You did EWI prior to June 15 2012, and you have lived in US continuously since June 15th 2007.

There is no explicit requirement for the last arrival in US being before turning 16, there is no requirement for continuous presence before June 15 2007. I also looked over the I-821D form, they do not ask for continuous presence before June 15 2007.

If it were me I would attach a small letter explaining why you believe that you are eligible. They may reject you one way or another. They will not send your case to ICE unless you are denied for criminal reasons.

Also make sure to attach plenty of evidence for 2007-2012 (bank statements, school/college records/bills/etc).