Considering your symptoms, it is best to see a urologist. The symptoms of a urinary tract or prostate problem include regular voiding, pain on the side, and tip discomfort. Treatment must be sought to ensure proper diagnosis and treatment.

During puberty it's normal for the frequency and spontaneity of erections to change. Hormonal shifts affect sexual development differently for everyone. While early puberty often involves more frequent and spontaneous erections, this can change as puberty progresses. There's nothing wrong it's natural.

To control premature ejaculation, you can try techniques like the pelvic floor exercises, and psychological techniques to reduce anxiety. Consult a urologist or sex therapist may provide further guidance and treatment options if needed.

It's normal for a clear fluid called pre-ejaculate to come out of the penis after urination or during arousal. This fluid can contain a small number of sperm and might be more noticeable when you're talking to a girl or feeling sexually aroused. 

You may have a urinary tract infection (UTI). UTIs typically present with symptoms such as frequent urination, itching in the urethra, and difficulty urinating. These bacteria require treatment through antibiotics like LeFloxin. Complete the full course of antibiotics to clear the infection. Your doctor might prescribe another medicine if the symptoms persist after the first round of treatment. 

Masturbation is normal and healthy sexual activity for most people and normally does not cause permanent damage to the penis. But excessive or aggressive masturbation may lead to temporary discomfort, such as soreness. Its impt to practice moderation and use lubrication if needed to avoid excessive friction.