Will I loss my character after 7 day trail ends?

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Hey, sorry if this is in the wrong place.

I have right now been using the 7 day trail from fileplanet and want to continue playing Planetside as I love it But I have been told by a few people that I need to go out and buy a copy of the game, I can't just enter my credit card details anywhere and let Sony charge me $19 or whatever.

But I am worried about something, will I lose my character? I mean when I enter the CD key from the copy that I have to buy does that mean I have to start from the beginning again or can I continue where the trail left off?

I did try to post this on the planetside.com forums but I can't seem to login.