I was masturbating from long time, but one day I obsvered red color sperm, I stop for few days, then I started again which last for few days without blood and again I seen red color sperm, then after 3-4 days while urinating I observed blood come out after I finish urinating. Please let me know where any problem in that and as I am worried about the situation, please let me know as soon as possible

Go and see your Doctor.
Passing blood like this is NEVER a good sign.