My question involves labor and employment law for the state of: Illinois

My employer recently was harassing me about my medical condition. He was threatening me with termination all night and made a snotty comment about going to the hospital after work.
I was just released from the hospital for irregular heart beats which was determined to be from Coronary Spasms. Spasms can be triggered by stress and if the spasms last long enough can cause heart attack.
His harassment drove my Blood Pressure up to dangerous levels and he could have caused me serious problems.

Should I contact the EEOC about something like this?

Could my condition be discribed as a disability?