Loa before maternity leave

Currently 30 weeks pregnant, working from home but the work is stressful. Everytime na papasok na ako i feel everything, cramps, back aches, sciatica, migraine, the works. Parang inuunahan na ng katawan ko yung mangyayari sa shift ko. Before ako pumasok, lagi akong naiiyak. Oo, i know it sounds na tinatamad ako, pero I don't want to feel this way. I love my job and want to be with them longer pero the stress that i get every time I'm going on shift really hurts me and my baby.

Can i tell my ob to advise me to bed rest so naka LOA ako before my maternity leave? Is it even applicable to be on LOA due to stress? Ayokong gamitin agad mat leave ko so i have time to rest during pospartum.