There are many causes for such burning during urination.
Dehydration: this is a surprisingly overlooked cause. Inadequate hydration can cause this.
Stress: even after an infection is cured, often health anxiety will lead to increased sensitivity during micturition, leading to feelings of burning persisting from the infection. This is the most likely cause for you.
Other conditions that need to be considered are: Ureaplasma parvum infection, Interstitial cystitis, abacterial prostatitis, prostadynia, Urethral syndrome.
You should be aware that stress and health anxiety also play a big role in this. You are likely to be having some anxiety about your condition and paying a lot of attention to these symptoms, and this is causing you to continue to feel the symptoms even though there may not be much of a physical problem. You should avoid paying attention to your symptoms and just give it time and relax.
It is also normal for some semen to be excreted in urine, this happens specially if you have a period of abstinence from sex and masturbation.
If the symptoms persist you should consult a Urologist. But usually this will not be needed. Take the following steps which will help you:
Take lots of water and fluids - this is virtually the most important step in home treatment.
Cranberry juice - this is known to be very useful in UTI
Urine alkalisers - Bicitra, Citrolith,Oracit,Polycitra-K, Uristat tablet - you can get this OTC at pharmacies, use this.
Avoid tight underwear, use loose comfortable underwear
Avoid or minimize outdoor activities like cycling, joggin, etc
Avoid rough sex and prolonged sex
Avoid heavy exercise.
No lifting of heavy weights
Try to avoid stress - cut down on coffee, alcohol, smoking.
Regular hours of sleep.
Good healthy diet.
Iron, Vit. C and Zinc supplements
You should try with stretching exercises for the hip joint:
At the same time, you need to control your stress and health anxiety. If necessary consult your doctor for anti anxiety medicines. If the symptoms persist after this, then you should show a Urologist.
Hope I have been able to clarify the situation for you and helped in resolving your query.
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Thank you and I wish you the best of health - stay safe!
Dr. P. Jyoti