My employer put me on notice 2/21/14 sales were down. I explained biz in our area down. He then put me on notice 3/5/14 to perform goals by April 7th. I completed the goals. On April 7th he was telling me to get biz cards, etc then on April 9th wanted to review goals. At that time he was upset because he had not seen a letter from my mental health practitioner I left in his inbox on march 28th and gave to hr on 3/28 for my employee file. I reviewed all the goals I did achieve what he asked and then some. On April 14th he let me go. Do I have a case for mental health discrimination because my doc wrote about my learning disability as well as the stress and duress this has caused an increase in since 2/21/14.