Hello Rona,
I would like to have further details of your case, before confirming my advice. When you were born in Spain, did you get any type of Spanish document, a National ID number, NIE, libro de Familia, or some type of residence card?; what was the status of your parents in Spain during those 7 years? When were you born and in which province? This is relevant information for you case.
Generally speaking, you can actually apply for Spanish citizenship based on the fact that you are a Philippine national, though you will need to be a legal resident in Spain for 2 years before applying for the said citizenship.
Please feel free to email me on Patricia at Lawbird.com if you wish to discuss your case further.
Best Regards,
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