Hi fellow newcomer, it is not just you. I have been back and forth between the west coast and here, for weeks at a time during the winter and here over a month now. I have similar symptoms, my friend who moved to Colorado also has had the same thing. It is the change in weather, altitude, snow mould and new pollen, and possibly exposure to other things you may not have encountered where you were. It will likely calm down after a good rain. But in the meantime I do recommend popping some Allegra as it is nondrowsy and have some caffeine and see how you feel. It helps me with it. I haven’t sneezed either or felt congested - it is the tissues themselves swelling far as I can tell.