Desperate to stop being sick or feeling nauseous!!

Please help with suggestions, I've tried everything and anything you can think of that is natural to stop being sick or having consistent nausea! I had a few bits to eat yesterday but only managed to keep two or three biscuits down! I have drank a small glass of squash (juice) down today but nothing else! I can't get a doctors appt at my local surgery.

I nearly passed out in the shower last night... The temperature was definitely not top hot! I'm in the UK!

Please help ladies, what should I do?! Xx