Progesterone support and BFP question

Cait
Hello! I am currently 10DPO from my first <a href="https://glowing.com/glow-fertility-program">IUI</a>. I am supplementing progesterone to help maintain because of a past progesterone deficiency after ovulation. I think I had a BFP today, but my doctor does want me to test until Monday. They are concerned it will still be the trigger if I test sooner.  The thing is, after Thursday I'll be out of progesterone. Is this going to be harmful To go without it for a few days until Monday when they are back in the office? Has anyone ever discussed this with their RE? I'm just wondering if I need to call in tomorrow and try to get someone before the holiday. Your advice is appreciated! 
Thanks!