Before being diagnosed with POTS I was so sick: dizziness, lightheadedness, nausea, vomiting, facial flushing, feeling hot one minute and cold the next, itching all over/rash on face, light and sound sensitivity, tachycardia, low bp, burning in my arms and chest, blurry vision, headaches, difficulty breathing, feeling of a lump in my throat. I was put on lexapro and a beta blocker, and started to feel so much better. How is does lexapro help? Does it make your bp higher? Also I tkae an allergy pill everyday, this helps for some reason.