Eh, considering yang anak pertama you awal 23 hari, I'd say start maternity leave around week 35 lah, so basically sekarang or next week sudah! You're already feeling the signs (sakit pinggang, kencing frequent, perut cramps) and since history tends to repeat itself, better safe than sorry, kan? A few of my mum friends who delivered early like you regret kerja sampai dekat due date sebab exhausted gila, especially kalau dah ada anak lain kat rumah to manage. Definitely check dengan doctor or clinic esok when you go, depa boleh assess cervix and give you the medical clearance untuk leave early. Better ambik leave awal, relax and prepare, daripada berangan² lagi eh!