tmi I know, but have you been having bowel movements? Can you keep even the tiniest amount
of water down. Like start with a sip, then a couple minutes later take a nother sip, and so on. I think your best bet is to go get checked out at the hospital, after two days and losing 4 pounds, which is probably water weight, your body has got to be feeling the effects of dehydration. Go get them to top up you fluids with an intravenous , and hopefully some gravol, and feel better soon!