Fired due to pregnancy

I was let go today from a newer job, granted today was my 60th day. Ever since the manager had found out I was pregnant he has acted different and basically like a jerk to me. So he started doing interviews two weeks ago to fill my position after telling me I was doing well and so on. Instead of telling me himself that I was fired he sent his assistants assistant to do so. Pretty upset since I had never been fired from a job let alone for a reason such as this.