When I was in my 30's and early 40's (I'm 56 now) I used to have a recurring anxiety dream wherein I dreamt that I had screwed up and didn't have enough or the right credits to graduate college. It felt so real that upon waking, it took me a few moments to realize that not only had I graduated college but also law school and was married (then, divorced now) with 2 kids. At some point after I left the marriage and my family business and dealt with my substance abuse issues, those dreams stopped.
I've only recently started having dreams of any kind that I remember a bit of but not for long. I do spend a lot of time in hypnagogia, the space between awake and asleep. I do some of my best thinking and many of my poems and essays emerge from there. Some days I slip in and out of that space often and I stay in bed extra long to do so and commune with dearly departed souls and my spirit guides.