I don't really get flouride treatments anymore :/ Unless its in the polish they use, I'm not sure. I remember hating them as a kid though, god that stuff tasted awful. I haven't noticed any MG symptoms after, other than just a bit tired and weak int he mouth & tongue from holding my mouth open and all that. I get the usually icky feeling after
It could be because you hate the dentist also, I'm sure that doesn't help the after taste.
I know that Kiss My Face's triple action and whitening toothpastes are flouride free. I use them, they're nice! They're all natural ingredients.