For the last couple years, my ears have seemed much more sensitive to loud noise and sometimes I feel like my eardrums 'twitch' or something in irritation. I also feel like my ears get plugged easier and feel the need to 'blow' while plugging my nose to open my eustachian tubes.
Recently I've had some crazy, rushing-sounding tinnitus in my left ear that I've NEVER heard anything like before. It often aligns with my pulse but not always, and I can practically feel it, just like you 'feel' certain sounds hit your ear if they're loud enough or the right pitch. It's like someone is blowing softly in my ear and it's filtering through my heartbeat. But, for however alarming that sounds, or however alarming your tinnitus or hearing loss seems to you, most causes of tinnitus are truly not serious. I have a hard time settling for "Oh, it's not serious, don't worry and find a way to deal with it," as most people do, but at least it's good to know it probably won't cause any further problems. Have you had an MRI? If not, you might try to have one done - it will probably ease your mind if you're worried about the cause, and might even help them pinpoint a cause that they can possibly do something about.
Tinnitus can be caused or worsened by hearing loss, stress, anxiety, prolonged tiredness, fluid in the ear, too much loud noise, caffeine, and salt. Try to drink a lot of water, have less caffeine and salt, get good sleep, and listen to music without headphones or through headphones that don't go directly inside your ear (or, if you absolutely have to use those, keep them at whatever you feel is a safe amount of sound - about half volume on my mp3, might be different on yours - even if it seems quiet to you, if you give it a couple weeks or even days, you'll get used to it).
Oh, and tinnitus (if it's pulsatile, like mine) can also be worsened by anything that makes your heart work harder, most of which are also not a big deal so try not to worry about it. I am anemic and found out that could be part of the reason for my tinnitus, so I'm probably going to be told to go on iron supplements again and it might help.