I've been trying to learn meditation and mindfulness lately and as im trying to be calm im beginning to learn things about myself. Im spotting specific things out about myself that I've never noticed before. 

I've realised at a state of an empty mind when I choose to think about a bad memory, a cringe moment or even an event of regret. I can remember and see it perfectly. Even if its from year's ago or just the other day.

Now,
When I try to think of a moment of peace or happiness or maybe enjoyment. I have to try ridiculously hard to picture it, I have to run details over to make sure it's right, Its like everything is foggy.

Im just wondering what and why this is. Any helpers would be appreciated