Michele suggested checking Mildred Goldberg's tombstone to see if her original first name is there, and knowing this name will help you search for her passenger manifest. If your Mildred is the one married to Adolph, and she passed on in 1938, than she is at Mt. Hebron.
(Block 54, Ref 12, Sec J, Line 8, Grave 1)
Mildred used the maiden name Levine on her 1899 NYC marriage record, and on the birth record of her son Solomon. On her death cert her father is listed as Solomon Levine.
Perhaps she arrived under the surname Levine, and not MICHALOWICZ?
Good luck in your search,
RATOWSKY / CHAIMSON (Ariogala, Lith.); LEFFENFELD / FINK / KALTER (Daliowa & Jasliska, Pol.)
BOJDA / BLEIWEISS (Tarnow & Tarnobrzeg, Pol.); WALTZMAN / WALZMAN (Ustrzyki Dolne, Pol.)
LEVY (Tyrawa Woloska, Pol.); SOLON / SOLAN / SOKOLSKY (Grodek, Bialystok, Pol.)
BOBISH / BLUMENKRANZ / APPEL / WEINER / ROSENBERG (Vysoko-Litovsk, Brest, Biala Podlaska)