Every Couple Of Days My Ears Seem To Fill Up

Every couple of days my ears seem to fill up with fluid leaving me talking in a tunnel. My ears pop, too. I think it is allergies or stress. I tried a Netti Pot,2 days ago and that helped. I was clear for 2 days. It was back again this afternoon and I was back in the tunnel. It is better now but I still have some noticeable but minor pressure