Hi Diane, my weight is average. It evens out when you eat the right stuff and your body eiminates toxins. But it can take time before this happens. I'm neither too thin, nor too big (yet have been both in my life in the past).
I have been overweight and underweight before. Once, because of candida (and no doubt other problems) I lost weight and could no longer gain and this was because it destroyed my appetite. I could barely eat an entire apple over the course of a day, though I'd eat a bit more in the evening. I was very very slender to say the least. Once I went on the candida diet, my appetite returned and I was able to gain more weight.
Yet at onetime with candida, I was the opposite and was overweight and bloated. So yes it can go either way for anybody. It just depends what it does to you and what you may be suffering at the time. So that time the candida diet served to help me lose that weight.
I've not used Stevia, but have heard it mentioned on the candida forum I used to belong too (which is the really strict one) and yep, people do use it there. But I don't, because I don't want to keep my taste for sweetness hanging around. Eventually cravings do start to go after you stick to the diet long enough. They won't go though if a person keeps adding bits of this or that. They will continue. Cold turkey sounds cruel, but it's sometimes the only way. Though once I could eat a bit of fruit when I craved sweetness desperately and I got away with it then. I don't get away with it now. Again, that depends on how severe your problem is. I'd go really strict in order to find out if this diet is really going to help you.
You can always loosen up sometime later with natural high carb foods and see if symptoms return and if they don't, you maybe lucky and should be able to get away with eating them again. But steer clear of actual sugar and wheat/gluten/ and yeast. They are usually ALWAYS going to harm.
I don't use anything for salad dressings lol. I just cut up raw vegetables and eat them. But sometimes I used to use some olive oil and lemon juice

You maybe able to find some good recipies on this website Diane, and other helpful tips - click on this link -->
http://www.healingnaturallybybee.com/ Though this website is even stricter than the diet I'm on, it's very similar and offers many great health tips!
They don't even allow nuts/seeds, yoghurt at first....but I do ok on those, so I left them in. They help me snack and I find it doesn't seem to do any harm.