Taste sour after drinking
Combined rubrics; fear examination; failure
?Reproaches herself (may not be the best rubric to use)

Some ideas: nux-v is possible (3 under sour taste; also under av sour). Lyc is a second choice, bar-s is third, and phos is fourth. More history will help to confirm or rule out any or all of these--

Brief suggestions / ideas only:

nux-v: perfectionistic, competitive, impatient, driven, may also have a fear of failure

lyc: cowardice/fear of failure with compensatory egotism, ambition (usually not the same degree of impatience as nux)

bar-s: feel small, less capable relative to others, possibly ridiculed / laughed at; can be critical of oneself and others (similarities to lycopodium, but more the feeling of incapacity relative to others)

phos: not 'grounded', many fears; sympathetic /affectionate

Good luck--