Symptoms of Psychological Disorder. Me.

I doubt to have some psychological disorder. I search on internet and I realize that my symptoms are matching with Alzheimer's disease. I am forgetting the things very quickly and it's increasing day by day. Such as household work, office tasks. I finding it difficult to complete any tasks. Confusion in even simple disicion making. I am not able to remember names and faces of new people. Also most of the times it's very difficult for me to recall name of person whom I know. I am not able remember numerical things which was not the case few years back. I used to remember any numbers accurately. I am always having fearfulness. Don't know about what things. Since 4 to 5 months I am feeling like ommiting and nausea in the morning and fluctuating fever. It is becoming very difficult to wake up from the sleep in the morning and feeling very weak after wake up. Also my mood is always keep changing.I am really fearful of what can be the diagnosis of my symptoms. Please guide me.