Please can you help?

I am a 23 year old female and I am around 5ft 6 and only weight 7-8 stone. I suffer from Neurofibromatosis Type 1 and also IBS (Irritable Bowel Syndrome). I also have scoliosis. I was born with Neurofibromatosis and Scoliosis but the IBS developed in my teens. Recently it has got worse, and medication don t help. I have been tested for coeliacs disease and diabetes and both have come back negative. I have been told by three several Doctors that it is IBS for sure. I get pains no matter what I eat, and don t gain weight at all, even though in the past I have tried and tried. I always stay the same or drop in weight. At the moment I have gone off food completely and so I have hardly ate a thing for a few days. I will admit I am scared of food, and I know this sounds ridiculous but I cant cope with these pains much longer.

I am seeing a DR on Monday but what will be the likely outcome if the DR realises ive lost weight and not eaten? I m not doing this intentionally and I m not doing this for attention, I m just genuinely scared of food and not eating makes me much happier.