Hi mama! Congrats on your pregnancy, December baby, how exciting!
Please go back to the hospital or call your OB right away though, kahit sabi lang nila mag-rest muna. Bleeding during pregnancy needs close monitoring, lalo na ngayon na malapit na ang due date mo, better to be safe at makita ng doctor kung ano talaga ang nangyayari, hindi guesswork lang.
Once your doctor gives you the okay, then you can follow their advice on rest vs. movement, they'll know best based on what they find. A few of us moms have been in similar situations, at honestly ang peace of mind from seeing the OB ay priceless na, especially when bleeding is involved. Mag-update ka na lang sa kanila, don't wait, mama!