My son became very ill with a kidney stone 4 days ago and did finally pass it after 12 hours of terrible pain. Now he is suffering with diarrhea that is green and often and severe continued nausea since the stone passed. He took 3 pain pills for the pain initially and has rarely taken them, so could it be a side effect of them? he s also had high fever off and on. We are concerned as we live 3000 miles from him and he has no one there to help him. He did go to urgent care, but they told him to drink water and take Advil..any advice?