Pregnancy dreams

Last night was a rough night for me. Daniel and I had been packing for a couple of hours, trying to finish the kitchen--which it is, finally--and went to bed exhausted. We crashed at about ten, which may not seem late but it is to an early-morning bus driver and an eight-month pregnant woman. I apparently hadn't been asleep long, though, when I jumped awake, sobbing. I tried to remember why I woke up, but all I could remember was the dream I had been having just before.
I can only recall the few major details of the dream, but essentially I was stuck in a cardboard box. And while I was trying to find a way to get out of this box I realized I could hear someone crying. And it was a scared, needy, desperate cry from a baby. There was no doubt in my mind that the crying was coming from my baby. It kept getting louder and louder, and more and more desperate. It was like something was torturing her. It was probably the most heart-wrenching sound I've ever heard. But no matter how hard I tried I could not get out of that box. I tried beating on it; I tried shaking it; I tried to find where it was taped so I could break through. I felt so helpless--I was abandoning my child, and she needed me so badly! That's when I started crying and woke up.
It was honestly the scariest dream I think I've ever had. I just layed in Daniel's arms, shaking, and sobbed for at least half an hour as he tried to get out of me what was wrong. I couldn't talk, I couldn't breath. All I could think about was the sound of that crying.
It took me several more hours to get back to sleep. I was so shaken that nothing could calm me down. You know how they say to visualize a calm, peaceful atmosphere--like a beach, or the mountains--when you're trying to relax. That's never really worked for me. What does work, however, is imagining stirring a pot; I usually visualize stirring a white sauce, with it getting thicker and thicker as it heats up. Even that old standby was useless for me last night. I was terrified that if I fell back asleep I would hear the crying again.
I realize now that I'm probably just nervous about being a mom--my due date is less than three weeks away, now--and the stress from the moving is probably getting to me as well. A stressed pregnant woman is not a good thing apparently. I still get teary-eyed when I think about that dream, and I can't help cringing.
Has anyone else ever had a dream that just stuck with them? Something that rattled them so badly they couldn't forget it? I'd appreciate any words of wisdom on how to forget about it. It just continues to linger in my mind, no matter what I do!