Good morning everyone! I have a long backstory I want to share and get opinions while I'm waiting for lab work to come back!
So around February of 2025 I started feeling slightly lightheaded, but could still function. After a year of tests (t4 was elevated 6 times it was taken, was told we'd watch and recheck, tsh in normal but lower end of normal the whole time, t3 was normal but only checked twice) In May of this year they found a severe b12 deficiency. I had 5 daily injections for that then 2 weeks later everything went south. Severe lightheaded, constant chest pressure, weakness in arms and legs, frequent SVTs and PVCs (they said was normal) hair thinning, loss of libido, periods got lighter and less day, extremely cold feet, heart racing if I'm in direct sun, can't sleep (they told me I have sleep apnea probably) I had asked my Drs if it could be a thyroid thing, with the t4 being constantly higher. They said it wasn't high enough to mean anything. We have extensive family history of graves disease (2 aunts, 3 uncles and about 14 of my cousins have it and my grandma passed from medulary thyroid cancer, which all the Drs knew).
I finally was able to see an endocrinologist who said basically the fluctuation in my t4 and tsh could signal early hyperthyroidism and I may have had it for awhile but treating the b12 (she suspects pernicious anemia or autoimmune gastritis as the cause tho I haven't had it confirmed yet) she said a lot of people with one autoimmune disease end up having 2. So she thinks treating the b12 just brought out the severe symptoms from graves. I'm waiting on some of the advanced thyroid labs to come back but while I'm waiting I wanted opinions on if that could be what's going on?
Symptoms are extreme lightheaded, blood pressure spikes when I stand, constant chest pressure, PVCs, hair thinning, I've lost 35 pounds in 2 months without trying, freezing cold feet, racing heart when in heat, weakness in legs and arms but I don't have the normal racing heart, I actually have sinus bradiacardia (my resting heart rate is 52, sleeping is mid 30s) is why I'm so confused about it. Thank you to anyone that takes the time to reply or read this, I'm so nervous! I've been in and out of the ER so many times for the extreme lightheaded and chest stuff (echo, EKGs and chest X-rays come back normal)