I'm very sorry to hear of your dilemma.
Unless you have a written contract of employment with your employer, you are probably considered an employee-at-will. This means that there is likely little protection afforded you relating to unreasonable supervisors/bosses, as well as the typical office politics which can be so troublesome.
In Illinois, employees are presumed to be "at will." At-will employees may be terminated for any reason, they can have their hours or pay decreased and they can suffer a cut in their benefits, so long as it's not illegal or discriminatory. Generally, employees who work under an employment contract can only be terminated for reasons specified in the contract. In your state, an employment relationship is at-will unless there is a defined duration for the employment contract or if the contract permits termination by the employer only under specified circumstances.
Unlawful discrimination would include an employer discriminating based upon a person’s Ethnicity, Color Religion, National Origin, Gender or Disability.
Even an alleged reason for termination that is not factually correct will not lead to you having a viable cause of action for the loss of your job unless your civil rights, as outlined above, have been violated.
I'm afraid that based upon the facts that you have presented that you do not have a case for unlawful termination.
I wish you well.
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