I have been on Thiroyd for about a month prior I was on nature throid taking 2 grains a day, lately I have been really dizzy with head rushes with low body temps average 96.5 and fast pulse 120 +. Also have horrible water retention . I can't get body temps stable. I recently had a ACTH test done doctors say it's ok but the numbers didn't double like they should, so I don't know if I have weak adrenals or it's a thyroid problem. Please I could use some help .