I know that I have dreams at night, I just don't remember enduring them like when I use to. Why?

I have this happen sometimes too. Has your sleeping schedule changed at all? I notice that I only remember my dreams when I wake up for a few minutes in the morning and then go back to bed. Otherwise, I have no memory of anything. Could possibly be from a change in your diet too. I have more vivid dreams when I have sugar at night (though I don't recommend trying it -- trying to fall asleep with a sugar high is not fun). When you do remember your dreams, try to think about what you did that night and narrow it down from there.