Is it normal that i have a randomly accessible memory?
Recently, I have these randomly triggered memories. Not short term, I'm talking stuff from around 15/16 years ago (I'm only 19 now). In vivid detail, usually followed by an overwhelming sense of pointlessness and depression. I have no idea what triggers them, or how they are of any importance- they are insignificant things, such as being on the swings as a 4 year old. My nan and grandad had just bought me a walkie talkie like device, and all of the other children were taking the piss. But I didn't care. I was happy.
And there are many others, like when my parents argued when I was five. I'm not going into any detail on that or any of the others. Mainly because I forget most of it afterwards, but what I do remember is depressing and horrible. I feel lethargic and sluggish just after I get a memory like this, even if it is a happy one.
So what the hell is wrong with me? Please answer, I need to know whether it is normal or whether to go see a shrink.