Disability discrimination and pretext for termination

Looking for advice on a disability discrimination complaint/wrongful termination. As a senior manager, i worked for a large consulting firm in CA (significant federal contracting). I have a long history of back problems and probably "qualified" under ADA. I was layed off less than 2 weeks after I told my VP I couldn't continue working due to chronic pain. VP acted wiered in that he totally ignored my complaints and had me finish a critical assignment, after which I took three days off. Reason for termination was given as a RIF, despite recent reassurances job was safe. Also told company had looked for other openings to place me. I immediately filed a workers comp claim that pre-dated my offical last day. Its already been approved by firm's insurance carrier. Been on disability 3 months. Prior to filing complant with FEHA & OFCCP planned on asking corporate EEO Officer to do an internal investigation. With firm 13 months. Other than disabilty and reasonable accomadation requests I was a solid contributer with no complaints. Recieved company awards, etc. The whole process smells bad, but there's a good chance there was no mixed motivation. What should I do? Thanks.