Erection and blood with sperms

Patient: I am 19 years old. i masturbated last time on 2nd january and after that when i masturbated yesterday, my penis was not being erected and as straight as before . any ways when i masturbate with my ejaculation a small amount, very very thin or small layer (not a drop) of blood was present with sperms?plz tell me either it is a symptom of any disease or it is a disease?

Symptoms: still no issues with my penis i piss well without feeling pain.but lower side of my penis is dried with dried weather, i feel a little pain due to it.

Doctor:

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Patient: thankyou,