i am a virgin ,male 22 years old, for the last 3 days i have a strange tingling and stinging sensation on my penis head,i dont masturbate these days,but i could remember that a week ago i ejaculated during sleep where my penis wasnt erect completely,or a bit hard,just aftr then i felt the urge to urinate,and this was the last incident after which this sensation came.i dont drink,but i smoke ,and for the last 3 days i had a very hard schedule with my exams and i drank a less amount of water.please doctor,help me with it,i dont feel good with it,i feel to urinate when it gets severe,or i feel to ejaculate.then i feel drops of urine comes out after i urinate.plz help me... plz