I start feeling light headed last year of november. Then i take ferrous sulfate iron supplement thought my blood is lower to made me feel lightheaded then i start thinking it constant that i did not know it makes output black bcuz of the iron i take it makes me feel nervous and worries everyday from lightheaded it get worst i started feel imbalance when i walk, sleepless night which made so worst of my head. I feel pressure in the back of my head i feel wierd sometimes if i eat it releif some of the pressure in my head, i also got neck sore when i had thr pressure in my head...i check ent no ear problem, went for blood test, thyroid, urinalysis everything came back normal. Please help im confuse of my symptoms. The dr. prescribe me anti-anxiety meds lexotan bcuz i kind of feel muscles tension, if i feel scared and worried about my symptoms my heart beat so fast, last december i got panic attack sweatings, hands, trembling heart beat so fast. I feel im going to pass out that time. Is this anxiety? When i take first one medication the next i feel a little better. But then last night i feel again my heart is beating fast feels hot flushes..so scared..please helpme i need some advice..i do not like to feel this way.