Based on the history and reported results,
diabetes/insulin resistance is not the likely explanation.
HbA1c 4.9% and glucose 77 mg/dL are normal. If the
testosterone is 4.17 ng/mL (≈417 ng/dL), that is also generally within the normal range.
1. Urinary frequency + burning
This needs separate evaluation rather than attributing it to diabetes.
Urinalysis + urine microscopy
Urine culture if pyuria/symptoms persist
If sexually active/new partner or STI risk: urine NAAT for gonorrhea/chlamydia
Check hydration, caffeine/energy drinks and alcohol intake.
Do not start nitrofurantoin/antibiotics empirically without urine assessment unless there is a clear clinical diagnosis of UTI.
2. Weak erections / absent morning erections
Normal total testosterone does not completely exclude other causes.
If persistent:
Repeat morning total testosterone (7–10 AM) on a separate day if needed.
Consider SHBG + calculated free testosterone
Prolactin
TSH if not recently documented
Review medications, sleep quality, stress/anxiety, pornography/masturbation pattern, smoking/alcohol and cardiovascular risk.
At 25, psychogenic/performance anxiety is common, particularly when investigations are otherwise normal.
If organic ED is established and there are no contraindications, a PDE-5 inhibitor such as tadalafil 5–10 mg or sildenafil 25–50 mg can be considered under medical supervision. Never combine PDE-5 inhibitors with nitrates.
3. Calf/sole pain and weakness
Check:
Serum
electrolytes: Na, K, Ca, Mg
Vitamin D
CBC
CK if there is significant muscle pain/weakness
Consider
B12 only if clinically indicated (417 is adequate if the unit is pg/mL).
Adequate fluids, regular exercise/stretching and correction of any electrolyte/vitamin deficiency are usually sufficient if examination is normal.
4. Post-meal sleepiness
Occasional sleepiness after meals is common and doesn't indicate insulin resistance by itself. Avoid very large/high-carbohydrate meals, maintain regular sleep and exercise.
Importantly, fasting insulin 4.17 alone cannot diagnose insulin resistance. If you want to assess it, obtain a fasting glucose + fasting insulin from the same sample and calculate HOMA-IR, although routine HOMA-IR testing isn't generally necessary in someone with HbA1c 4.9%.
Suggested initial work-up:
Urine routine/microscopy + culture, CBC, electrolytes/Ca/Mg,
creatinine, fasting glucose,
lipid profile, morning testosterone ± SHBG/free testosterone, prolactin, TSH, and vitamin D.