Are these malar bags or festoons or just swelling after lower blepharoplasty? (Photo)

YOu have some swelling right at the lid/cheek junction and in the malar fat pad.  This can occur after a lower lid bleph in some people.  with time it usually resolves.  If it persists, then some deep ultrasound or radiofrequency can help to tighten up the area.  Unfortunately it can persist for several months.  

If you did not have swelling in this area before surgery and if it is not there all the time, I suspect that it is temporary and should stabilize in time. The eyelids are susceptible to intermittent swelling after surgery.  Other influences are sinus congestion, allergies, fatigue and high  salt in your diet among other things. Avoiding or controlling these influences in addition to intermittent icing may be helpful until it stabilizes.  This could take 3-6 months. 

Do have any history of lower eyelid hyaluronic acid fillers?  This can stay in the lower eyelid for years and will affect how the eyelid hold water.  This appearance is consistent with retained filler holding fluid in this space.  The treatment for this is to enzyme the old filler out to release the extra bit of swelling that is being held there by old product.  If there is not filler, give this more time to heal.  If it persists, something more will need to be done to address this because the result is not acceptable.

Swelling with string is seen. Try cold compresses, hydroquinone 8% cream. Sometimes Thermi Smooth 250 RF sessions help.

Sometimes the eyes take a very long time to finish healing.  The skin around the lower eyelid is particularly thin so any small amount of bruising and swelling can be visible.  I would call your plastic surgeon and try to move up your appointment.  I am sure that she/he would be happy to see you sooner to help relieve your concerns.  Best of luck!