Eh, I think this is normal la, hormones memang boleh jadi a bit wonky after vaccination, especially if timing coincide dengan period kamu! A few of my mum friends also noticed their cycles shifted or had spotting after their jabs, so you're not alone. The frequent urination and increased appetite could be hormone-related too, tapi kalau dah more than a week and you're worried, better check with your doc just to be safe, they can rule out anything else. For now drink plenty of water and don't stress too much about it, usually settles within a few days!