32 Weeks rant about going to work

Context: I am a primary school teacher in SG. I am a private patient in NUH. I am REALLY exhausted after lower primary classes. Physically and emotionally. I had panic attack last week at work. Last checkup was a few a days ago and my gynae refused to grant me HL for the next 3 weeks till next checkup at week 35 - only gave me 1-week HL. Knowing that I have 2 more weeks of work in my current state is giving me stress. I have maxed out all my MCs already and I was really hoping to utilise the HL entitlement to rest at home. Can I bring myself to A&E on the last day of my 1-week HL and request for longer HL till my next checkup? Is that possible? Anyone had long HL from week 30 onwards till you gave birth?