In addition to what others have said to you about getting professional advice. I'd advise you to be careful with over the counter medications and other forms of self medicating. You don't want to end up with a physical ailment in addition to the mental strain you are under.
I also advise you to visit this site only on occasion and only visit to let us know what's on your mind (if you find that helpful) and only read the comments others have made on your post. I wouldn't read any of the other posts and comments as it may be too much for you right now. It sounds like you are reaching, or have reached the saturation point with the topic of Jehovah's Witnesses. I'm guessing you already know all you need to know on that subject and may need to focus on your own peace of mind rather than what is going on in the JW and "former" JW world.
Sometimes enough is enough and dwelling on or rehashing over yours or others grievances about their experiences with that religion, may have stopped being therapeutic and may not be healthy for you at this point.
It's common knowledge that stress is often the cause of headaches and other more serious ailments. At this point you may need to avoid other stressors such as watching certain movies or television shows and especially the news.