The top of my mouth has been itchy. It's been getting worst, lately my left nostril and the roof of my mouth has been itching at the same time one ni?

Prolly grass pollen. Classic signs of respiratory allergy, Tiffany. And given the time of year in the US, if you're feeling it outdoors, it's pollen - both grass and trees are high right now, but even a few weeds are on my pollen rod when we read it these few days. It grabs what's in the air; we plate it onto a slide by hand, stain it red and check under a microscope. Find a local allergist to know for sure.
ALLERGY ALLERGY. start taking benadryl (diphenhydramine) at night, and zyrtec during the day. drink a plenty of water.