Ay, ang PhilHealth system talaga, napaka-complicated sometimes! Based on what you shared, since na-cover mo na yung buwan from May 2023 to October 2023, dapat okay na dapat magamit mo ang benefits mo for your December delivery, pero honestly, I'd suggest you go back to the PhilHealth office ulit or call their hotline to confirm directly kasi bawat case talaga may slight differences, and you want to be 100% sure bago magpa-admit sa hospital. Better safe than sorry, lalo na malapit na ang EDD mo! One of my mum friends had a similar issue and she went directly sa PhilHealth counter with all her receipts and they cleared everything in person, maybe that would help din sa case mo. Keep your proof of payments ready, okay?