Since you have ruled out diabetes and UTIs, and your current medications (an antiparasitic, a urine alkalizer, and Vitamin C) have not resolved the issue, your symptoms may be due to Overactive Bladder (OAB) or benign prostate enlargement. Alternative medical treatments include anticholinergics (like Solifenacin) or beta-3 agonists (like Mirabegron) to calm the bladder, or alpha-blockers (like Tamsulosin) if prostate-related. Lifestyle modifications such as pelvic floor (Kegel) exercises, bladder training, and limiting caffeine or alcohol can also provide significant relief. I highly recommend consulting a urologist for a detailed evaluation, possibly including an ultrasound, to determine the exact cause.