I went through a little frightening experience when I had sexual intercourse last time. I had sex five times that night with my girlfriend and I did not use any protection. After I ejaculated, I noticed that the sheets were stained with blood spots. I noticed that the stains on the sheets were spurted from the ejaculation, so I realized the blood was from my semen. I have never heard for this, but friend of mine told me that problem is called hematospermia, so I want to hear more about this condition.
I can understand you worry, because I had problem the same nature and I was so much worried. Since I was health and monogamous, I knew it was not some sexually transmitted disease. When I noticed hematospermia I had rough sex during all night. Since that happened to me, I have masturbated a few times to see if there was any blood in my semen again. In all instances, there was no sign of blood or hematospermia, which I found as great news. I wanted to ask doctor if rough sex might be the reason for the blood in my semen or is it something more serious. He told me that hematospermia, or blood in the ejaculate, is a symptom that provokes great anxiety in patients. It is due to fears of malignancy or sexually transmitted diseases, but as I describe him my condition, he said there is no any reason for alarm. He said I could think of blood in the semen in almost the same way I would think of blood in nasal mucus, when someone has a bad cold or sinus infection. He explained that it certainly is a sign of problems, but it is nothing to panic about, but I would recommend you to seek a medical opinion.