I keep hearing clicking sounds in my left ear and sometimes both. its very slight sound and it goes away when i pinch my nose and blow with my mouth shut. but it comes back again.iam scared is it tinnitus? or earwax? is it something to worry about?

This is most likely the natural reaction of the Eustachian tubes between the middle ear and throat opening and closing. The tube allows mucus made on the inner walls of the middle ear to drain into the throat & air to enter the middle ear and equalize the inside pressure to the outside. I would ignore this I expect it whenever your jaw moves in certain ways. It has no worrisome meaning..