Depends on your age, your meds, and I don't know what else. If you're talking to a 60+ person, chances are you are in the same ball park with many. They find it shocking until they talk to their same age friends. I have found out that medications to help you sleep like Ambian and Lunesta can give you memory problems and it says so on their sheet. I have heard people on some antidepressants say the same thing on some blogs.
Still, wh en you go in for your annual checkup, ask. Then ask what you can do about it. Then ask a nutritionist what you can do about it. Then ask a herbalist. No one wants to lose their memory, especially when the person that brought it up is as old as you are. Course, it is easier to remember the bad stuff that happened to you because it lingered in your mind. Easy to forget that you were treating someone else poorly unless it was a long term harassment.
When my mother lost her sight at the age of 85, her memory went straight down hill. She couldn't keep her brain stimulated enough because she couldn't read, see TV, move along with an exercise video. She could have done so much more though and we were willing to help her. But she declined. Her memory was slipping each month.
Bet you can get much of it back by improving circulation, your diet, and your brain with exercises. Don't just practice something or do the same thing over and over (crossword puzzles, etc). Make it new, brand new, the studies say. I'll be interested to see the other answers you get and perhaps most interesting was someone that tried and succeeded in getting it back. I don't think I've ever heard of hypnosis bringing back a person's memory (unless it was from a tragic event). They say they can bring back a memory, or random memories -- but not your memory in general. But who knows. Anyone?