Hi artluvr, I have been experiencing almost the same symptoms since the trees started releasing pollen a couple of months ago. It took me a little while to figure out why I was having adrenaline surges and anxiety for no apparent reason. My skin allergy tests came up negative for trees, so I am not classically allergic to the trees by me, and my doctor is scratching his head. After adding flushing and tachycardia to my list of symptoms, my doctor approved increasing my Singulair dosage which is starting to help. In my case, I certainly am having allergic-type reactions in an environment where I am not classically allergic to them. Hayfever symptoms are not as bothersome right now. This has started me down the mast cell activation path, and I'm hoping to see a specialist in the next couple of months. I too was already taking Zyrtec, but all of my symptoms have broken through that as well. Benadryl got me through a couple of rough patches but I'm trying to save that as my rescue medication. It's always good to have something to go to! I highly recommend looking into a low histamine diet. Oh - I have also used Prilosec occasionally and for short courses to get me through some rough spots with stomach distress but it has a delayed reaction. I hope you feel better.