What is the reason for on and off urinary infection?

Hi doctor,

I am a 28 year old male. Approximately, six to seven years back, I had urinary infection when I was sexually active with my girlfriend. I was advised to take an antibiotic course, which I did not complete at that time and the infection was not fully cured. After that incident, I used to get urinary infection once in a few months. During urination, I sometimes used to have one or two drops of blood only during the time of urinary infection.

In addition to the above mentioned problems, I have some other issues related to sexual health. Such as premature ejaculation, extremely bad timing, sensitivity of the penis skin, lower back pain, lack of confidence, etc. Very often on my way to the toilet some urine drops are leaked. During night time, I have to stand up several times to urinate. Sometimes, approximately once a week after urinating suddenly sperm drops are released, but I have not discussed this part with my urologist in person. I am not a stressful person, so the reason behind this has to be something else than stress. I have now recently been to a urologist and I was told that the infection became chronic. The doctor recommended antibiotics again and I have now completed the course. The urinary infection should be cured by now. All the new tests were negative. The urologist told me that my prostate size is bigger than people in my age. Please suggest me some good solution for the above mentioned problems. I want to get married soon and live a healthy life. The ultrasound has been made. The urologist here told me that, my prostate size is bigger than normal people in my age. This is not suppose to happen until a person gets older. That is the main reason of feeling weak and not being able to control urine, etc. I hope you understood all my problems. Please suggest me some medication for all the above mentioned problems. Thank you.

Thank you doctor,

Do you require any new tests such as ultrasound or any specific blood or urine test? I felt some kind of burning sensation in the urinary tract. I do not know whether the urinary infection is gone yet or not. Now I do not have any test results with me. If there is a requirement, then I can manage to go to the laboratory and collect them.