Hi, I Have This Problem: In My Country There Most

Hi, I have this problem: in my country there most of contraceptive pills and emergency contraceptive pills are scarce. I had an accident with a broken condom on saturday. I've been looking the next two and a half days for any option available, as for the Yuzpe method or levonorgestrel pills, but only could find Cerazette which only contains desogestrel. As a progestagen-only pill, would it work if I took it alone to equal the dose of Postinor, for example? That would be 20 pills, divided in half in two takes?
I hope I am making myself clear. I don't have any options in hand. I can't get an IUD. I'm very worried.

Thank you.