I get congested sinuses and ear popping and pain after working out too (weird). And, since my late 20s, many bouts of sinus congestion end up with pain, ringing, and loss of hearing for up to 2-3 weeks. Many times it led to ear infections too, and steroid shots and antibiotics no longer helped.
What finally worked? A doctor at the local emergency clinic (it was a Sunday and I couldn't wait one more day to go see my regular doctor due to the ringing driving me insane!) told me to use a neti-pot. Over the counter, basically salt water that goes in one side of your nose and out the other, and it magically clears my sinuses every time! I thought she was crazy, but once my sinuses drained, my hearing immediately returned and the ringing stopped. They are all connected - ears, nose, throat, so I guess it makes sense! Just figured I'd throw that out there.