25, NP, cis-female, Mirena IUD inserted 2.5 months ago. I got the first two Gardasil shots when I was in my early 20s. I never went back to get the last one due to conflicts with my college schedule. Is it too late for me to get the last one now, or do I have to go through the whole process again? I haven't been sexually active in the last 4.5 years, if that matters.