HI, last week I was woken in the middle of the the night from my lower back/sides throbbing in pain.  After a while of trying to block the pain I had some soymilk and it seemed to make it better.  Today I have bright green stool and the throbbing pain is back and I cant seem to make it go away
Hi. The green stool is definitely suggestive of an intestinal infection, for which you need to see you a Doctor to get a prescription based antibiotic and supportive medicines. HE will also examine you for such a bad low backache. Till then apply warmth the back, may apply relaxing ointments if you have.