Why my left speaker sounds louder then my right

If you have a switch on a component that inverts the phase independently for each channel, make sure they are the same.

Don't torture yourself until you're sure it's not your hearing. I had a very similar problem. It was my hearing.

It would be helpful to know more about your system. Whether you are using tubes or solid state. Also, what speakers you have and whether they are biwired. First you can try selecting mono and listen for an imbalance. In mono the sound should be in the center between the speakers. You can also set both speakers side by side in the center of the room. Using the balance control in mono compare the left and right speakers.

another vote for a hearing test. the downside: you'll be shocked what good hearing aids cost.

I agree with Marco1, I am experiencing the same thing currently in my setup, and I do have hearing loss in my right ear. I just move the balance control to favor the right side and things now sound normal.