Even among experienced astral travellers, mediums and spiritually enlightened people, there's things that go beyond comprehension, like your case with these doctors, I have no clue of what that could've been.
Maybe your spirit guides could answer that for you. Don't be afraid dear. Fear is only on our mind. If you need help in getting rid of fear, then I'm here.
As you said yourself in the post name that's an awakening sign from your third eye.
There's not much that can be done. You can give it a massage with your fingers in circular motion,listening to calming and soft music while lying down is good,too.Sleep can also easy the pain.
I'm pretty sure it's from your third eye, but if the pain is abnormally strong and persistent, it would be wise to go to a doctor, after all that never hurt anyone.
Suzie said it all, you just have to keep trying and work with different methods,see what works and what doesn't, this way you can mix up steps and create your own technique.
Any more doubts and we'll try to help in the best way.
Oh,my. The act of only counting your breath takes away the spontaneity of the experience and turns it into a purely mechanical activity.
It requires deep relaxation and focus to keep awareness in a way that you won't make too much effort,for that could also ruin the attempt.
It really doesn't matter what kind of technique you use or even if you made your own, the one thing that is crucial ,is relaxation,without it, you will never be able to project.