Are weird and vivid dreams an early symptom?

Kristin
I've always been known to have strange dreams but two weeks ago I started having them every single night! And they are mostly of me in a bad situation and I have to escape or save people which in the dream I do. 
I'm late but don't think I'm pregnant. All I've had are these weird dreams, lower back ache and peeing a little more than normal. 
Just wondering if anyone else had crazy dreams very early on in pregnancy?