Unhappy with my uneven lower face. My jawline is not defined and uneven and my lips are small and uneven. Any suggestion?

Your look great and everyone has some asymmetry to their face. Both sides of your face are not twins but sisters and it is normal to have differences on both sides of the face. Your best treatment would be a preventative skin regimine. I recommend  a healthy lifestyle: a diet high in
fruits, vegetables, nuts, legumes and fish; eight to ten hours of sleep
nightly; limiting alcohol intake other than the occasional glass of red wine;
and regular exercise. An important step for all skin types is sun protection
including the use of daily sunscreen, sun hats and sunglasses, all of which
help prevent aging and sunburns. When it comes to rejuvenating and
prevention treatments, a combination of treatments are available including
cosmeceuticals (skin care products including ZO® Skin Health or ZO® Medical,
Skinceuticals® or Glo-Minerals®), neurotoxins (Botox®, Xeomin®), dermal fillers
(Restylane®, Juvederm®, Esthelis®, Belotero®, Emervel®, Radiesse®), and skin
resurfacing procedures (advanced laser resurfacing or OBAGI® controlled depth chemical
peel).  These are advanced techniques so be sure to get an experienced
dermatologist or plastic surgeon consultation for recommendations and treatment
options.

Everyone has some degree of asymmetry in their faces.  Although the asymmetry seen in the limited photos are subtle, there are several options to make subtle changes to achieve more symmetry which can make a big difference in the overall appearance.  Please consult with a board certified specialist who can assist you with achieving the results you seek.  I think you would also benefit from a 3-dimensional analysis and computer imaging to help you visualize what you may look like afterwards and to serve as an important communication tool with your face specialist.