Blood came out from my penis when she is sucking my d**k & another time after having sex with her. Please tell me what I have to do. Why this happen?

Bloody Discharge. I would have to recommend you see your doctor to evaluate this. Try to think about if any pain was associated with the bloody discharge. Try to recall if you had any other recent penile discharge. Ultimately, you do need a face to face evaluation and some lab testing.