One side of my face is changing drastically, sometimes one eye seems to droop. What can I do to improve it? (Photo)

I have noticed for a year or two that my face is becoming more and more uneven. most noticeably, one eyelid will sometimes droop heavily and one eyebrow seems much higher than the other, it is very apparant during facial expressions. Now I notice that my nostrils mouth and cheeks are very uneven. I did have Bell's palsy when I was in 5th grade, I am now 27. I'm wondering who to see if this may be a medical condition or what I can to to repair it.