What Causes Slight Warmth And Discomfort In My Penis Shaft And Head A Week After Rough, Unprotected Sex?

Hello, I am 20 years old.I had unprotected sex with my new girlfriend 7 days ago once.It was rough and she bled slightly.The next morning there was a slight cut or bump which I assumed was from the rough intercourse,It healed the next day and I did not think much about it.7 days later I feel warmth and a very slight discomfort and action in my penis shaft and head area.There are no other signs or symptoms I feel yet.There are no bumps or blisters on my penis.Whatt would this be?