your regular doctor is fine or you can go to a walk in clinic since it's a weekend.
What kind of Dr. Will I do to?
you need to go and be seen and get these looked at.
if they are herpes, they will do testing and prescribe you medication.
grace
Do you or have you had a sexual partner? We would only be guessing as to what it was on your penis. Call your medical provider on Monday and try to be seen - an exam is ultimately what you need to know what's going on.