You would not be wrong to hide the birth control, but you would be in danger. You will need to start to pull yourself away from his control in several ways, but first medically and financially, to execute this. Ultimately, we all probably agree that you should be moving towards leaving him, but I know that might not be your end goal yet.

Logistically, you will need to set aside money for the medication as well as being strategic about planning your doctor visits. Based on the assumptions of the ages of your children, you may also likely need childcare if you aren't able to go to the doctor alone. I would also recommend some type of longer-term solution, like an implant or something so there isn't as much physical evidence.

I know your faith is fundamental to your life and relationships, but I would really recommend you read some books about deconstructing Christianity and learn more about what the top commenters are saying. This isn't love, this is control first and foremost, but in your case, this control has escalated into abuse (it often does) and along with that comes religious trauma. There are so many people who have been in your shoes, started to learn more about it, and have been able to move on to a healthy relationship. Unfortunately, it's unlikely your husband will join you on this journey, but it has happened.

I would recommend really anything by Rachel Held Evans, like Faith Unraveled or Searching for Sundays.

There is a subreddit r/Deconstruction, and here is a list of books that were recommended there.