Been having some sinus congestion. Picked up some @ the pharmacy behind the counter. Half an hour later for about a few hours felt like I was having a heart attack, panic attack, shakes, wtf. Feeling better now I usually take Zertec D, etc. Don't know what happened but Just going to take some Flonase tonight. Hate this time of year and early spring? Any suggestions for bad allegeries? Think about going to a specialist for allergeries...