It's known that smoking makes chilblains worse, or may even cause them. Nicotine constricts your blood vessels, and the blood vessels in your extremities, fingers and toes, are already miniscule.
Quit smoking! It's one of the best things you can do for yourself.
I gave up smoking years ago. I used to get chilblains too but they completely stopped when I stopped smoking and have never had them since.
You can get ongoing support by joining your local Stop Smoking Group, run by the NHS. Once a week group meetings for a number of weeks – I think they're designed to help you quit midway during the course. nhs.uk/Livewell/smoking/Pag...
They also supply free nicotine replacement therapies which you might have to forgo because of the chilblains, but I'm sure you'll get really good support from the professional mentors and your fellow quitters.
Like you say, smoking is contributing to your anxiety not relieving it, and the Candida will also cause anxiety, irritability depression and more.
You must already be doing the main thing – cutting out all sugar, refined carbs, alcohol, certain fruits / juices etc – as the Candida feeds and grows off any sugar you eat.
You need a really good probiotic to help eliminate the Candida and to repopulate / rebalance your gut bacteria. We should have something like 80% good bacteria to 20% bad bacteria, there is a symbiotic relationship between the good and the bad – the good guys also keep the bad guys in check.
If you like, I can send you some Kefir grains so you can start making your own Kefir. Or you can buy it online. Homemade Kefir [fermented milk / yoghurt] is a really effective, potent probiotic. The "grains" are bacteria and yeasts which you have to feed with milk as they feed off the milk sugar i.e. lactose. So it should also be ok if you are lactose intolerant.
Hopefully it'll help to clear the Candida, but people have a daily swig of this whether they have any ongoing gut dysbiosis or not. Cheaper too as you just have to buy milk to feed them.
This information on Candida looks like it's set out quite simply.
You might find a few nuggets of extra information that your nutritionists haven't covered. I see he also gives the same info on videos which might be easier to take in.