Timing will vary from person to person for the amount of time it will take for their period to come back post-pill.
Your body is undergoing some huge changes and detoxing out hormones as well as foods etc. Be patient and you should notice a change very soon.
If you had normal periods before going on the pill, it should usually only take around 3 months to naturally get your period back.
If you had issues with your cycle before going on the pill, it is important to note these may return as your body attempts to bring back a natural cycle.
Remember, whilst being on the pill, the pill may have masked many of your symptoms and these can return when you decide to come off the pill.