I have periods almost every day that last several hours. I feel very tired or faint, have chills, and a woozy feeling in my head., almost like a swoon. That's the only way I know to describe it. My ears also ring louder (I have tinnitus), and I have feeling of pressure and tingling on the top of my head. It's awful. When it hits, I have trouble even conversing with someone or standing. I just want to lie down. Later in the day, toward evening, it's som better. I was on 'Zoloft several years ago during a stressful time in my life, then went off. I'd hate to take it again, since it was hard on my digestive tract and gave me hand tremors. Took me quite awhile to taper off it too, because I had withdrawal effects from it. Anyway, could this be anxiety? Anyone else experience the chills, fatigue, tingling, etc?Thanks.