Thank you for your reply.
Unfortunately, the term "hostile environment" has a much different meaning to the courts than it does to most employees. The US Supreme Court has held that the laws on workplace harassment/hostile environment were enacted to protect people from conduct based only on age/race/sex/disability/national origin of the employee and they were not intended to create a code of civility in the workplace. See: Oncale v. Sundowner Offshore Services, 523 U.S. 75 (1998).
What this means is that the laws do not really protect employees from personal dislikes or personality conflicts in the workplace. There are no anti bullying
laws in the US I am afraid.
So, if you are being bullied by their conduct and it has led to medical issues, you would have to prove their conduct is "so outrageous to shock the conscience of the reasonable person" and if you can do that, you can sue the individuals involved for infliction of emotional distress and seek damages from them personally for their conduct towards you.
If you can show they dislike you only because you are AA, then that would be grounds to file a complaint now with the EEOC
and the EEOC would investigate the harassment based only on your race and the retaliation you are receiving for reporting that discrimination
and will issue you a right to sue letter if they find sufficient evidence supporting that claim.
The fact is that even if you cannot prove your race was the reason for the conduct, RETALIATION is a separate claim and you could sue them for retaliation for your making a complaint about racial discrimination in addition to your emotional distress claim and still have a legitimate legal basis for your claims.