Suggest Treatment For Loss Of Memory And Cold Sweats

Hi i am 31 and have started noticing a few problems with my body. My symptoms are loss of memory sometimes i have to repeat myself over and over again, i forget what i did an hour ago,forget if a had anything to eat,my speech has changed when i am talking i don't know what i am saying, when i am talking i talk like a 6 to 7 year old child, i just make any sense anymore. I have cold sweats at night sometimes i switch off for a minute or two. Please advice me on what i should do i have been to the doctors had some test done 12 months ago but nothing showed up.