Congrats on reaching 31 weeks, mama! A few of us have started dates and raspberry leaf tea around this time, though honestly walang strict rule, it's more about what feels right for your body, kaya pwede mo nang simulan ngayon if you want. The 30-minute walks, 3 times a week ay perfect na perfect, sobrang healthy at safe yan, and maraming mommies sa circle ko swear by regular walking para sa easier labor din naman.