I got a knife cut on my finger last nighti put two bandages on it overnight but when i went to change them this morning my cut reopened and started bleeding again what should i do ?

Cut finger: Sounds like you cut yourself pretty deeply. Please seek help from a a clinician. It may need stitches.

Might need stitches: You already know the answer here, but even if the bleeding was not an issue, perhaps examination by a doctor can determine if you have nerve or tendon damage that is not apparent to the lay person, but shows up later as a big problem. If the cut is superficial and not infected, tapes or super glue can hold it together until healed. Tetanus status ok? Another reason to see md. Prevention > problem!