Sorry to hear that, if you are seeing small bumps on the penis then I would certainly recommend you to please visit a doctor as soon as possible. It might be an allergy or any disease such as genital herpes. It is not certain as of now as you have not been diagnosed. However, in this case, the chances of genital herpes are quite much as you said you had unprotected sex that too with one of the many Porn stars. As porn stars as we know indulge in intercourse more often and they are always bearing some kind of infection with them. If you have unprotected sex with them then it might hurt you a lot. However, it can also be an allergy. Hence seeing a doctor is recommended highly. I would also suggest you that whenever you have intercourse whether it is anal, vaginal or oral with any unknown person like porn stars then you should always use protection. Protection like condom should be sued every time. it is not just the Porn stars from whom you should be careful but having sex with your close friends can also be sometime dangerous if you don’t wear protection. In your case if it is genital herpes then you might b in serious danger as this disease is not curable and the medication that is available for this will only lessen the effect of this diseases to some extent. It will not cure you totally. I hope you are satisfied with the answer I provided you. It is high time that you consult a doctor as soon as possible to be sure. Take care.