What are the investigations done for these symptoms?
Your symptoms would warrant a blood work for thyroid function tests. An EKG and a chest x-ray also would be prudent, with these manifestations, to rule out any heart related ailment. Stress and hot flushes are the other possibility, which are slightly different than the menopausal flashes (note the spelling difference). The factors linked to hot flushes and your other symptoms are;
1) higher body mass index
2) higher follicle-stimulating hormone levels
3) lower high-density lipoprotein cholesterol levels
4) vaginal dryness
5) trouble sleeping
Gabapentin is the medicine of choice to help in hot flushes.
Your physician should also get following investigations for the assessment of your symptoms;
1) Thyroid function tests
3) Adrenal function tests
Please feel free for your follow up questions.