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.

It can happen when the muscles which are responsible for urination become weaker. During the straining to pass stool, pressure on the bladder led to the release of urine. This can be brought about by reasons such as aging, childbearing, and specific diseases. Thus, try the pelvic floor exercises, manage your fluid intake, and visit the medical doctor to get further help.

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.