Any 30+ women here gotten the HPV vaccine?

I'm 31, not married but in a long term relationship. I was planning to get the HPV vaccine, but it kept getting postponed for so many reasons. My younger cousin (26) recently went to get the vaccine, and the doctor told her that once you're sexually active, you're already exposed to most strains, so the vaccine wouldn’t work as it should. Has anyone here gotten the HPV vaccine after 30, especially after being sexually active? Did your doctor say anything different? Also, which hospital did you go to? Would love to hear your experiences.