Job discrimination

My employer has been calling me into the HR for the past 3 weeks. The first week, she complained that I don't communicate effectively when I go to a doctor's appointment (email is not enough); so I corrected that. The next week, she complained that my work schedule is not coherant with what she needs in my position. So I started working later in the day and putting over time. In that meeting she said, it was just my schedule, nothing to do with my skill level. The next week she complained that I wasn't performing to the standards of my position. I was hired as a senior accountant, but was supposed to move to Financial Analysis w/ training as I do not have experience in Financial Analysis. Her idea of training was telling me what needed to be done when the investors had request due at the end of the day. The mistakes made during that training was written down as my difficiencies. She wrote down in two pages, my difficiencies which were a result of inproper training. The company offered me 30 days to improve on the complaints and if not, get terminated or take 30 days pay and leave the company. The thing is, I don't know if I can improve on the list if I am not trained as promised. Is this job discrimination?