I had HPV that went away on its own -- can I get it again?

Yes. Once you've had it you always have it. For more: www. Peedoc. Com @thepeedoc.
Yes. HPV is not like measles, once and done. HPV is a family with dozens of strains, many of which infect humans. Once you have it, visible signs may disappear, but it can remain dormant in your system for life and return. You can also acquire other strains, since they all act individually as infecting agents.