Missing time and memory loss?

Has anyone else had it where you wake up and have memory of say, monday morning, then nothing and you wake up on thursday or sunday having no memory of what happened and people tell you about it but you honestly wonder if it happened at all? am I alone?

Recently put on meds? I was upset to find out it was October a month or so out of the hospital. I guess I wanted it to be September?

Yes I have, I know how you feel. I don't have a clue what is going on. It's that time of the year