cosmo, let me put it this way. a marriage validly entered into outside of Philippine territory is recognized by the Philippines. Its recording is not an element for its validity, so whether it was reported or not, you are from a legal point of view, considered married.
However, if you were to apply for a Philippine marriage license, you will be required to produce a Certificate of No Marriage (cenomar) which you will be able to acquire from the NSO because there is no record of your previous marriage.
You should be made aware that getting married again, while your previous marriage is still subsisting, is a crime of bigamy and your second marriage will be void from the start.
However, your second marriage if you choose to continue, will be considered valid until someone challenges it by filing a case against you. The legal risk for you is if you have enemies, particularly your husband.
I recommend to you that you find a way to dissolve your first marriage first. if your hubby is now an american citizen, he can apply for divorce.