I used to have a similar problem, it was about a year ago when I was very deep in my depression. I'd awake a couple times a night feeling very scared and hopeless, I contributed it to my being in such a depressed state. I believe dreams try to tell you something, even when you cant remember them, they're a reflection of your deep and most centered emotions. You should tell your therapist, they might be able to help you find out why this is happening and help you through it