Well DA I have had many many OBE's and thankfully have never had the sypmptoms you describe.There is something not quite right with you suffering all that pain.For what it is worth i am sure you are very close to having your first OBE which usually for most people is quite a terrifying thing..eg when i was 17 over 37 years ago i had my foirst OBE...when I found myself floating above my physical body i looked down at it and went as you Americans would say"ape excrement" and shouted to myself "Get back! get back!"..and I did...but after that initital fear no problem..keep doing the pre sleep meditation.energy body charging and good luck..you are not far from your first ecstatic experience.