Welcome to the forum.
I know about
what you are feeling.
As if there is an evil enity inside that you have controlled or did not know about
; then all of a sudden there it is. It is becoming dominate and out of control.
You are not possessed. It is your 'shadow' self. Our bad emotions. You never learned to deal with them properly or something as triggered you that you are not aware of. I put a link at the bottom of the post for you.
Definately call the Doc. ASAP, tell them in detail what is going on. How you loose control, what is happening when you do, who you feel during and after.
This can be fixed.
You might even consider therapy for a couple months, just see what might me tucked away in the back of your mind.
I wish you peace and comfort. Know you are not alone and welcome to stay and post here any time.
Trina
/www.psychologytoday.com/blog/evil-deeds/201204/essential-secrets-psychotherapy-what-is-the-shadow