Cysts on labia

Hello! I am 21 years old and I usually get a cyst on my labia every few months that pops and goes away. However recently I had a HUGE one and it became painful to walk. It eventually popped but now I have noticed three in my labia. I have been tested for STDs (negative) and talked to a doctor about them (before they got worse) and received no advice other than it's "normal". I would talk to my doctor about it again but I no longer have insurance.

Does anybody have something similar? Suggestions? Preventative measures? Advice?