I sort sort of know how you feel as I have a slight kidney complaint that can cause nausea and UTI symptoms (including stomach pain)... And I'm on strong medication for it which gives me acid reflux, constipation and occasionally nausea... So I get you - everytime I get the slightest twinge I assume it's a SV when it reality 99% of the time it's my condition/medication... It does sound like you are being exceptionally brave! Try sipping some lukewarm peppermint tea if you have some... I highly doubt anything will happen tonight. Sleep deprivation can make you feel very sick though so do try and sleep as hard as it is... Have you got someone with you? Sometimes when I'm having a 'scare' it helps when I'm with my boyfriend and, although he is sympathetic, he is quite firm with me and tells me to get into bed, cuddle up to him and relax - nothing terrible is going to happen. Xx