Oh I'm so sorry to read this. It's happened to my twice and it's horrible and scary when you're alone and sick and caring for a little one.
I ended up putting DS in his crib in the bathroom with toys and lying on the bathroom floor til it passed. Also, don't underestimate the power of ice cold water. I usually have it rook temperature but having cold water was magical for me. When you have to move move slowly. If your LO is crying it's ok, as long as he's safe.
I'd be calling out a doctor at this point if you can't keep water down. Hope you feel better soon x