M.P.
EVerything that you describe happens to me too. I have discussed it with doctors and also reasearched it and have come to find it is normal. I have also just had a brain MRI done and know there is nothing that would cause it so now believe it really is normal.
My doctor told me that how to tell if it is something like altzheimers is that you would forget things like what a fork is for or what milk is. ITs not as much about misplacing things or forgetting what you are doing.