The doctor is right on this does need to be checked out. There are many free or reduced clinics that work on a sliding scale based on your income. You can find many of these through needy meds. a website
set up to help low income patients.
You might also consider the possiblity that you have chronic cystitisor Interstitial cystitis too. Like above a good uro can rule out the cause of the symptoms. We do have an IC and pelvic pain support forum here on medhelp. I also am an IC support group leader and our website MOARK IC has many articles on IC that might help you to
find some self help tools in the diagnosis process to help symptoms too. This is the support forum we set up here too.
Here is the expert forum also where you can ask the doctor a question. He is very compassionate toward those of us with IC or bladder pain issues!
Hope that helps!
Without examination confirmation of a diagnosis is tough but urge of frequent urination can be due to diabetes mellitus. Other possibilities are glomerulonephritis, pyelonephritis(inflammation of the kidneys),urinary tract infection, hypercalcemia ,hypokalemia(low potassium),hyperthyroidism, hyperparathyroidism, diuretic drugs and pregnancy(in females).
In my opinion, investigations like urine for pregnancy test, serum HCG levels,kidney functions, blood sugar levels, ultrasound lower abdomen ,intravenous pyelography , thyroid function tests and cystoscopy may be needed to confirm a diagnosis. I sincerely advise you to consult a urologist or nephrologist and get yourself evaluated so that a confirmatory diagnosis can be made.
I hope it helps. Take care and please do keep me posted in case you have any additional doubts. Kind regards.