Does anyone know if there are other diseases that mimic MS that involve the heat intolerance sx as well as the other common sx (numbess, tingling, leg weakness?)

One natural therapist (chiropracter/naturopath) I'm seeing says I have 'adrenal stress' - and he doesn't think it's MS.... he's got me on herbs and just no sugar/no caffeine.

My doctor thinks this is a load of rubbish!

My neuro doesn't know about this theory, but she thinks from my exam it's not MS either. But she's going to repeat my brain MRI after 6 months 'to see if anything comes up'..
She's tested for loads of other things, but all negative.

I hope my chiropracter is right, but the whole heat intolerance thing worries me. I do the 'bath test' every now and then, and I'm always left weak and tingly. It's not very hot though because my kids are in there too!
Being too hot in bed leaves my right hand and forearm numb (always the same spot).
Too hot under the blanket on the couch has me weak and shuffling.

Is this quite specific for MS, or maybe it's something else?
Yours ideas will be helpful thank you!