Extreme Deja-vu

For about 9 years now, I have experienced something very strange. I get a feeling of extreme deja-vu that makes my heart beat fast, I get very hot, and I get an incredible urge to vomit. I never know when it's going to happen, but when it does, it lasts for 3-4 days. At first I had no idea where this irksome problem came from. As I got older it became stronger and I realized that it is somehow connected to my dreams. Sometimes when I'm sleeping/dreaming, the same terrifying feeling and urge to vomit, wake me out of my sleep. At that point, I always dread the next day or so, because I know it's going to happen over and over again at random times throughout my day (s). I never remember the dreams. Never know when it's going to happen. I will be going through my day and out of nowhere it will happen. I could be working, at home watching tv, or just having a conversation, and the horrifying feeling comes over me. (I actually just had an episode while reading this, and have been having them all day) It's a feeling of deja-vu multiplied 100 times. Sometimes it's so strong that I actually do vomit. It's almost as if I dream whole days before they happen, although I never actually remember dreaming it. Over the last few years it has escalated to the point that the "stupid deja-vu" experiences leave my nerves completely shot. Throughout the few days or so that it occurs (over and over through sleep and waking hours) I am completely on edge and carry around an unexplainable feeling of fear. My son/boyfriend coming into my bedroom unexpectedly will cause me to jump out of my skin. I find myself afraid to take a shower with the door closed, afraid to be in a room with my back to the door, and even afraid to fall asleep. I never know why I'm so jumpy, Except that I know it's directly related to the "deja-vu" feelings. I find myself begging for relief from whatever the hell it is, and praying it will end soon. I try to explain it to my family/friends but I know that no one who doesn't experience it could ever understand. I don't know if it's a gift that I don't know how to interpret/use. Or a curse. I usually refer to it as the latter, due to how bad it makes me feel. It leaves me scared, frustrated, and depressed. I really wish I could figure it out and find a way to end it. As crazy as it sounds, it's almost like an outer body experience when it happens and it makes me feel like my mind is on a different plane than normal people. Anyone who has similar experiences or any idea what this could be, PLEASE help me. I'm so confused and stressed behind this matter.