I hardly ever have dreams but I don't get REM sleep too often. I have had dreams where I had seizures in my dream and woke up knowing I had a seizure (aftermath). When I drink tea (any kind of tea), I have nightmares or bizarre dreams.
Almost 10 years ago I did a study because of bad dreams, they said it was night terrors (PTSD) and after 3 months of highly medicated/sedated sleep they finally passed. I feel for anyone who has nightmares, at one point I was so afraid to sleep because of them.
Hopefully they pass soon and make sure you avoid things like caffeine prior to going to bed, I hear it helps. I personally have coffee before bed, it's only tea that does that to me. Probably stress, too.
If it continues and is bothersome, try bringing it up to your doctor.