I have a problem with a certain drug. I do it regularly and its a pretty hard drug, lately I have been sicker than a dog. I been throwing up the past few days lots of stomach pain, around my ribs, lower abdomen, shoulder/neck and back pain on the left side, horrible headache, lightheadedness and today the right side of my stomach has started cramping and I've been so tired its hard to even keep my eyes open. Does anyone know why this could be happening??