I popped my blister by accident, been draining for 3days is that normal? when will the healing begin? do the skin come off on its on?

Blister: It's not advisable to pop a blister, but once it's done keep the area clean and apply an antibacterial ointment like bacitracin, cover with a loose gauze and fix with paper tape. It will heal from below and nature will remove the dead skin eventually. If the area shows spreading redness it may indicate infection and a physician should examine you.