go get your annual checkup (and all the bullshit they want you to do; vaccines, physical exam) BEFORE you get seriously ill or injured. You are statistically likely to gain some imperfection that might show up in your 20s.
PCPs and family medicine is only effective when they have a baseline to compare you to, meaning: if you can get in and establish what it looks like when you are 'healthy' (now, hopefully), 20 & want to be a responsible human being!
I.E. don't keep going to an urgent care until you get ill like me!