Arsenicum Alb
I know this sounds like a poison, but because it's been put through the incredible dilution and shaking process at the homeopathic pharmacy, there is nothing toxic left in it. Its just a great remedy for all kinds of symptoms like food poisoning with an upset stomach, diarrhoea and vomiting.
There can be burning pains which are soothed by a hot water bottle. Mentally too this can be helpful for symptoms like fear of being left alone ( in panic attacks). Worse time is late evening, eg. 11pm to 1am - 2am. Can't sleep.