I am 25 year old female.I have neurocardiogenic syncope and thryoid problems (low thryroid) which Im on medications for both. I havent passed out in a long time nor have I been dizzy. But the past few days Ive been extremely dizzy and passed out yesterday morning at work. I felt extremely warm, hands were shaking, and felt like  there was a weight on my chest, it was hard to catch my breath. I tried sitting for a while and eating, stinking water, nothing worked. I feel better now but am still dizzy on and off, have a headache, and still having trouble catching my breath. Almost felt like I was having a panic attack, but nothing was stressing me out or scaring me at the time so what could have caused this?
Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, you should get done thyroid function test to rule out high thyroid hormone levels because this can cause similar kind of symptoms. Sometimes, Chat Doctor.  If these levels are high then you will need reduction in the dose of thyroid tablets. Also get done blood pressure monitoring to rule out hypertension. If all these are normal then stress and anxiety are the likely cause. So avoid stress and tension, be relaxed and calm. Don't worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.