Methylprednisolone medrol symptoms and conditions

I was prescribed a 6 day pack of 4mg Methylprednisolone (Medrol) at the ER for an allergic reaction I was having to a gel that I used on my sking. The Medrol worked great at stopping the allergic reaction. My swelling, pain, and rash began to rapidly clear up. Unfortunately I began to have many side effects. On day 5 I was unable to get out of bed I was so tired and dizzy. I had a headache and mental confusion and unclear thinking. I called my primary care provider on a Sunday to ask if it is okay to stop taking the steroid. She said it was and that it was unlikely the medrol was causing my symptoms. She told me I had a virus. I told her the symptoms I was having were listed as side effects on the drug info sheet but she did not believe me. IA few days later I made an appointment to see a doctor, not the same one who took my phone call. This doctor said all of my symptoms were from the Medrol. She knew because of personal experience she saw in her mother who was also taking steroids. She told me medrol can cause a manic response or a depressive, the latter is what I was having. As part of my exam she wanted me to have blood work but said I should wait at least 2 weeks to allow the drug to get out of my system. It is now 19 days since my appointment and I am still having side effects: nausea, complete lack of appetite, dizzy, and tired all the time. I put a call in to my doctor today and am waiting to hear back. I am sorry that I took this medication, will never take again. How long will it take for this med to get completely out of my system so that I feel normal again?
A friend told me her mother had a manic episode on steroids. When I was younger I took steroids for a brief period and had much milder side effects.