Hi. At first i suggest that you stop taking excessive caffeine and hold taking ritalin and consult the physician who prescribed it to you about these symptoms.
Since you were extreemly fit prior to this and now you have developed tachycardia
with fatigue and depression
i would suggest that you get your thyroid function assessed at first. Down the line you have to also consider getting an echocardiogram
to assess for Left ventricular function, a problem with which may cause similar symptoms.
If the level of bilirubin you mentioned is total bilirubin
, it is within normal clinical range.