You should have your soil tested before adding amendments.
You don't know which way to adjust the ph without testing. Your local extension office will do it for a few $$.

Thanks for replying to my question :) I was wondering how accurate the "do it yourself" soil testing kits are?

I tested my sand recently, and the Calcium and phosphorous are quite ample. Not surprising, since florida sand is calcareous. Lime is ground limestone which is essentially what florida sand is along with degraded shells. Or there is dolomitic lime which is the type of limestone that also has a lot of magnesium. The sand could certainly benefit from more mag but it's unlikely that you want more calcium.

Other ways to raise the ph include adding copious amounts of OM, which is good all round. It raises the ph by increasing K and mag and other minerals which bumps hydrogen atoms out of the saturation.