hmm just read this about thyroid and acidity which is what i thought about why the acidity bothered me so bad:
Individual digestion and metabolism also plays a role in determining whether a food leaves an acid or alkaline residue. For example, certain foods containing organic acids, such as citrus fruits and tomatoes, which normally leave no acid residues, may be incompletely metabolized in some people and are acid-forming for these individuals. This is quite frequently the case where stomach acid is low or thyroid activity is subnormal (5).