Hi mama! At 30 weeks, mas safe na mag-skip muna ng hot oil with cellophane kasi ang init and the fumes from the chemicals might not be ideal for baby, better safe than sorry, yun ang advice ng OB ko when I was pregnant with my first. Maybe just go for a gentle scalp massage or dry shampoo na lang muna until after delivery, then you can pamper yourself ulit! Consult with your doctor pa rin to be sure based sa your specific pregnancy, pero yun ang kadalian ng maraming preggy moms sa community.