Why do I have gelatinous lumps in semen?

There are numerous reasons for a penis to not stay hard as for instance stress, anxiety, physiological issues such as diabetes or hypertension, and some drugs. It's crucial to see the urologist or sex specialist, if this problem persists. They can examine your individual condition and tailor the proper treatment plan.
 

As it is suggested by your symptoms, you should visit a urologist. Whenever any of the symptoms such as frequent nightfall, itchy and irritated urinary tract, early excitement or leakage of ‘waterly’ stick syrup from Voided Urine are noticed there is a possibility that an infection 0r inflammation has set in the Urinary Tract. Consulting a healthcare provider is considered necessary as opposed to self-medication which may aggravate the condition.

Based on your description of the symptoms, it might be that you had an acute urinary tract infection and antibiotics were used to treat it. Drinking plenty of water is needed and energy drinks should be avoided because dehydration can make UTI symptoms worse. If you are still shaking or experience other similar symptoms after the treatment, you should go to the doctor who prescribed the antibiotics to you or see a urologist.
 

You may have two coexisting abnormalities in the scrotum area (one called hydrocele and the other called varicocele). These two conditions may give rise to discomfort and swelling, especially when you're on your feet for a long period. Hydrocele is the consequence of fluid buildup, while varicocele occurs when the veins are abnormally enlarged. Treatment can be topical or surgical if there is a need to operate. 

A UTI can bring along symptoms such as frequent urine, a burning sensation while peeing, and urine that is cloudy or has a strong smell. The bacteria invade the urinary tract, thus causing the infections. Drinking more water, on the other hand, can help to displace the bacteria. In addition to drinking enough water and urinating after sex, wiping from front to back can help keep UTIs at bay. In the case of recurring UTIs, the doctor may suggest additional tests or long-term antibiotics.