That's what I call "the bathroom" dream. Usually, I have to go really bad and am in a public place. I either can't find the bathroom or if I do, there's something wrong with every stall. Either the door is missing or the toilet isn't working or someone is in every stall. I checked a "dream" site on the internet and it says that's a frustration dream. There is something in your life that you can't resolve or a project you can't seem to complete. I must say, I'm somewhat relieved to know other people have the "bathroom" dream. I thought I was the only one.
Other forms of frustration dreams are trying to phone someone (urgently) and you can't dial the numbers correctly, or you're waiting for the school bus and realize you're still in your p.j.s (I think we've ALL had that one, LOL!). I used to work at a place way out in the sticks and only had 1/2 hour for lunch, so I had to bring lunch all the time. One of my frustration dreams at that time was I'd open my lunch box and have no lunch or I'd stop somewhere on my way to work and couldn't find anything I could buy or have no money.
I've also had those horrifying dreams that seem so real you can't tell if you still asleep or are awake. Very vivid. You can recall colors and smells, etc. Scary.
Much prefer those wonderful "flying" dreams. I'm like Superman or Peter Pan. I go visit places from my childhood. Love those!