Should I keep wearing them or just ditch them all together? (Photos)

I wore retainers for 5 years, and stopped for 4 days, now they hurt. I've worn braces for 2.5 years (age 13-15), and after I got them off my teeth were very straight. I wore my retainers everyday all day for about 2 months, after that I mostly just wore them at night for about 5 years now. I stopped wearing them for 4 days. Now when I try to put them on the bottom retainers feel very tight, and the top retainers cause so much pain to the roof of my mouth that I wake up in the middle of the night because of the pain. However my teeth still look very straight.