Hard to get HL?

Hi mommies! I’ve been feeling so restless and my tailbone is hurting. I thought of trying my luck again to ask for HL on my next appt visit at KKH. Previously they only gave me 1 day & it’s not enough saying it’s part of pregnancy journey. I’m a HCW and it’s hard to get light duty. Is it really that hard to get HL at KKH under sub route? My colleague under KKH pte route can get it easily. & I also heard from my colleagues seeing NUH and they can easily get HL sub/pte. Any experience to share? I’m only 16 weeks btw.