First off thanks for posting, and don’t worry you’re not alone. Can you tell us, which area do you feel is asymmetrical? For instance is it your right side of lower jaw? Left cheekbones? It’s important to point out that no one has a 100% symmetrical face, everyone is asymmetric. In fact below is a good example of this. It’s a photography project where a photographer used PhotoShop to mirror one side of someone’s face by dividing their portrait in half, picking one side and flipping it to the other side. You can see how much the face changes. This will happen with everyone.
Nevertheless, if facial asymmetry seems noticeable or particular bothersome to you there are many ways to correct it depending upon if it’s your soft tissue (skin, fat, muscles, etc…) and/or bone structure causing the asymmetry – it can even be your bite (example cross bite).
For soft tissue asymmetry (for example cheek volume on one side seems higher than the other) this can be corrected in multiple ways using temporary and semi-permanent procedures such as derma fillers or fat injections.
For facial symmetry that is attributed to the facial bone structure: the cheekbones, the upper jaw, and the lower jaw. A surgeon specializing in maxillio facial surgery can correct this through facial bone sculpting techniques.