The right side of my face seems to slope downwards and makes my lips higher than the other side, what should I do? (Photo)

You have very evident facial asymmetry with the left side of your face (if the picture is not flipped) being smaller than the other side. Thus the jawline in particular is lower on the normal side and higher or shorter on the smaller side. The treatment choices depend on which side of your face you like better as  jawline shortening (if you like the left) and jawline lengthening (if you prefer the right) are very different procedures.