I am new here, just today. I also have a terrible memory. Sad that things like the birth of my children, wedding & supposedly happy times were pretend happy and I barely remember them. I was always worried and nervous during every big event. Now, I have a daughter who tells me she has been depressed since she was 8. At 12, we knew she was having anxiety and she has been seeing therapists and psychiatrists since then & just diagnosed with bipolar disorder 3-4 years ago. She's 25 now. She's also had spells where she doesn't remember things. I can't tell you why these things happen. I can only tell you, you're not alone.