This woman was in my dream she was pregnant and starring at me with these real intense eyes like she knew something and I was starring back at her and all of a sudden everything went black and I was in so much pain and this loud scary agonizing scream was ringing in my ears and it was like a demon inside of me trying to get out and I could feel the most crazy pain and my whole body was shaking and I was trying to rip open my skin to let whatever it was out! Words cannot describe it and I knew that I was in my bed and I was waking up from the dream but it was still happening and I swear to god I was convulsing in real life because when I snapped out of it I was gasping for air and my heart was racing a million miles an hour and I jumped out and turned my light on and then burst into tears!

The woman represents an aspect of your conscious thinking. Her pregnancy symbolizes an idea or behavior that you are developing, based on this part of your thinking. The focus on the eyes and the stare, indicate identity and vision. This part of your dream shows that a part of you that you may still be unfamiliar with, is working up a new idea or activity that has a lot of emotional importance to it.
The fear, anxiety, pain, that you feel trying to rid yourself of what's inside shows the impact of a negative event in your life. Look over your life and see the signs where you may have been carrying around a burden; something that you didn't realize had affected or is still affecting you today. See how it is building to the point where you feel that you can no longer keep it in.
I hope this helps in some way and that by talking it through with someone can help. God bless!

The latter part of what you describe, specifically, may have been a symptom of sleep paralysis as opposed to a dream. Here's a link to help you determine if it was a psychological or physiological issue.

demon: dreamdoctor.com/dream-dictionary/definitions/demon.html

Hope that helps!