I Am 66 Years Old And Have Been Experieceing Some

I am 66 years old and have been experieceing some forgetfulness, ex: when speaking or writing some times I have to search for a word...remembering names is getting hard. I have been diagnosed also with major depression. I wonder if I should be telling my Dr. about the forgetfulness and if I should take some med for it if offered. I alwo wonder how much depression plays a part in this. Thanks very much