It really depends on when you should be getting your period.
BUT... for some women who are just getting off the pill... or any form of BC for that matter... periods can be messed up and irregular. AND the fact that those hormones are no longer in your system can screw with your mind and your weight. It all really depends on how your body is reacting to not having the BC in your system.
BUT to play devils advocate... If you had your period around the 2nd of December (I believe that's what you said in your other post) then on a regular cycle of 28 days you should be having your period any day now. Actually should've had it a couple days ago.
No harm in testing though... Not like you do anymore than pee! But to play DA again... if your cycle is screwed up from the lack of birth control... You could be off on the ovulation dates and might not show up positive for a few more days anyway.
Now... as an example of how no BC can screw with periods... My sister was on a pill... and decided to change to the shot... stopped taking the pill a month ago... normally if she misses a pill (yeah... ONE PILL!) she starts bleeding... she hasn't yet... BUT she's tested neg on two preg. tests and she hasn't even tried to be with her boyfriend for about a month and a half. So she know's she's not pregnant... but for some reason she just isn't having a period.