Sound like you have two 'devils' by the tail?
1- The infusions - had my first this month, another tomorrow and am feeling almost, but not 'quite' human...and
2- The boss. vs. disability issue...It can become, IF you are cool a 'mutually beneficial' relationship, or a hostile one...Be very careful whatever you say. Think not only once or twice but three times before any provoking response.
Slowly responding to any provocation not only makes folks respect your answer more.. but in this FAST time and age, the tendency is to really listen to each word more, as it is going to 'appear' more thoughtful...In otherwords? Do not blurt anything out ever...I'm sure your lawyer has said the same.
Having been tangled in a discrimination situation myself ages ago, I know that that stress is like walking on a driveway full of hailstones! [Something NONE of us wish to encounter -if we can?]

Here is hoping the next infusion and the one after that is delightfully uneventfull regarding side effects [s/e's] and full of benefits! - j