So I've been having these symptoms for about 2 months now and I'm wondering if it's some sort of chronic anxiety response? Ive been terrified that its something medically scary (brain tumour, cancer, the whole lot) but doctors keep telling me it's anxiety. It's relentless and I'm not even doing anything that could cause anxiety currently so I'm struggling to understand. 

I've got tingling and aching on my left side (face, neck, chest, arm, leg), and the pain feels like it shoots down my nervous system. Also nausea, my gag reflex feels really sensitive, as if I've got a cold. And I get some random abdominal pains and feel sick a lot. I hate having this feeling, usually I'd happily put it down to anxiety but it's been 2 months and it hasn't let up. I'm terrified it's something dangerous or serious but I've had ECG and bloods and they're all clear... I can't understand this combination of symptoms and why they're sticking around for so long. Some days I wonder if my body is just stuck in a stress response. Has anyone experienced anything like this? I can't work or even socialise because I'm so worried about these sensations and feel too unwell all the time...its really affecting my life! Any advice or support is very much appreciated