At the piercing stuido you usually get some kind of pamflet with information on how to take care of it, what not to do ect. If you follow theese guidelines you'll probably heal in about 2-3 months.
It's nothing hard really, i think you have to clean it with boiled water & salt every day a few weeks after, no tight tops or troursers over it, no sunbathing, dont go swimming in pools (bacterias), i think swimming in the sea might be okay since it's salty and relatively clean, but you'll have to ask at the studio.
But if you like swimming and sunbathing maybe you should wait a few months for colder weather.
Obviously it hurts, but it's only pain for one or two seconds, and it's defineatly wort it
.