I experience bouts of terrifying dreams, and so has everyone I've spoken to about it.
They seem to come in groups and they are exhausting.
The last time it happened to me, my husband and I both had terrifying dreams at the same time, they were about home invasions. During the day we were arguing about how locked up the house should be on hot summer nights, and boy did we get each other wound up and paranoid. The dreams persisted until we discovered one night that our dog actually pays attention to what happens outside and guards us, and that's where it ended. So we luckily had an obvious cause and effect, and a satisfactory resolution.
So, aside from trying to figure out what you're being warned about/reacting to, I suggest you take a day off, to find a way to change your scenery, to ease your mind and see beauty in the world. Take a break from bad news of any sort. Have company over if you're so inclined.
Also increase vitamin & mineral intake (eat good food, or take a multivitamin). Pay attention to your calcium/vitamin D intake. Calcium deficiency is widespread, kind of a silent epidemic. One early symptom is uneasiness (think PMS), and that can carry over into dreams.
Whatever you do to up your vitamin intake, do it conscientiously for a few days so your body can replenish whatever you're short on.
There are several herbs/extracts that will help you ease your sleep in the short term, I'll tell you about two. They both interact with prescription meds so you need to be sure that they're compatible with whatever other medicine you take. I'm in CA so I can get this stuff at a regular drug store, you may need to find a health food store. Ask your pharmacist. Pick one or the other, not both.
5-HTP is a precursor to seratonin, mine was extracted from a bean. You take it at bedtime, and your body converts the stuff to seratonin. It's very gentle. You wake up the way a kid wakes up, kind of sleepy and groggy and you are in love with being in bed, but you have great energy once you get up. Wikipedia sez it's being used to treat children for night terrors!
http://en.wikipedia.org/wiki/5-HTPSt. John's Wort helps you sleep peacefully too. You actually feel rested when you wake up, as if you had a really nice long, healing slumber. It's good for kicking insomnia,
SARS oops I meant SAD = the winter blahs, and other forms of short-term blues. I didn't dream on it. It has to build up in your system though, so it will work really well the 2nd night. The side reaction is that your skin becomes sensitive to sunlight, enough to warrant a warning. Don't take it for more than a week and a half.
http://en.wikipedia.org/wiki/St_John%27s_Wort#Use_as_antidepressantI hope this helps. Fellow ASAH contributors, plz add info or correct me where I'm wrong.