I've been suffering with feeling extremely cold, brain fog, fatigue, headache, aches and numbness in extremities, strange strong metallic/sour taste in mouth, IBS and low mood for the past 5-6 years, im now 20 years old. I have also started to get some facial hair and i have irregular periods. I've seen various doctors and had various tests which have mostly been normal (celiac disease, IBD, folate, b12 deficiency ruled out).
I have been found to have subclinical hypothyroidism my ft4 and ft3 were normal and my tsh was 8. I have tried levothyroxine and could only take 25mcg and even then get side effects such as even stronger mood swings, increase in pain in arms and legs and dizziness. When i tried to slowly increase to 50mcg i felt extremely dizzy with extreme headache and pain in joints and had to stop taking it for a while and then start again on 25mcg. I am incredibly sensitive to supplements in general, i cant even take the tiniest amounts of supplements without getting side effects. I have tried every single b vitamin, vitamin and mineral separately and all cause side effects. Most cause me to feel extremely cold, like chills to the point where i cant function and brain fog, pains and numbness in arms and legs increases. My thyroid also keeps swelling up when i take supplements and i get pain in my liver area even with the tiniest amounts (not even 100% rda of the vitamins and minerals). I had an amino acid urine test done which showed low taurine, serine and leucine but i have tried these amino acids separately and still get side effects such as extreme mood swings and extreme coldness. almost every supplement seems to cause me to feel cold or causes pain/numbness in arms and legs and swelling of the thyroid area. I am at my wits end with it all. i even get side effects from vitamin a, d and e and fish oil. i cant drink any alcohol and i get dizzy doing exercise and feel thirsty when i exercise as if my blood sugar is unstable. I had a glucose tolerance test done which showed low glucose and low insulin after 120 minutes but I am not sure of this is normal or not. I had a urine test done which showed low iodine but I have tried supplementing with that and that caused side effects aswell as did selenium. B6 and zinc seem to cause the most extreme symptoms as i get extreme pain and burning in arms and legs with them.
Any advice on what this could be would be greatly appreciated as it is completely ruining my life at present.