I can't advise about the vomiting, nor the after effects. My only time so far was after my first pieces of ice after surgery. What has your surgeon said about your incision? Some people are slow healers, but if you're draining, that might mean other things that your surgeon would likely be interested in knowing. Not so much your primary care, unless they have extensive experience in abdominal surgeries maybe. So, your needle like pain is not at the weepy incision, but your stomach? HW 370, SW 350, SD 6/20/17