I am 1/2 Mizrahi/Sephardic and looked to see if you and I are related on MyHeritage...unfortunately, we are not. One suggestion that I have is to contact some of your DNA matches....if you have 2nd cousins and 3rd cousins, and see if they can provide any clues. Do you have your mother's maiden name, and perhaps your maternal grandmother's maiden name?  

There are also several good Sephardic genealogy sites, such as https://farhi.org/genealogy/index.html. 

All the best to you!!
--
Karen Calmon Lukeman
KALMANOWITZ (Lyubcha and towns near Grodno, Vilna and Minsk)
GOLDSMITH (Bakshty and Ivje)
NASSER (Damascus)
BENBAJI (Damascus)
BALLAS (Damascus)