Would this be a constructive discharge if I was forced to resign from my job?

After 2 years of service, I was placed on suspension for being a few minutes late. I wasn't told how long the suspension was for. My employer told a potential job prospect my disciplinary action that was pending, that prevented me from employment. I put in my two week resignation then my employer retaliated and cut my days and hours. Other employee that resign hours didn't get cut. My employer mistreated me because of personal reasons.