Mama, please go to the hospital or birthing center right now, this sounds like it could be labor signs, and at 39 weeks you need to be checked by your doctor immediately para sure. Don't wait, hindi ito paghintayin sa bahay.
Once you're there, sabihin sa doctors lahat ng symptoms mo, ang bleeding, ang pain pattern, at na 4cm ka na. They'll know exactly what's happening and what to do next. Sending you all the strength, mama, you've got this!