Frequent urination for past one month.

I have frequent urination problem from last one month . Took ultra sound of abdomen and found that there is post residual urine of 100 ml even after urination. I feel like urinating after every 30 mins to one hour. I don't have any pain in bladder just under my pennis there will some urgency for urination like a itching it urgency I don't know how to say that. After Uroflowmetry test my doctor said that flow of urination is not normal so there must be some obstruction in tract. Doctor gave me tablets for 45 days and asked me to come after that with new Uroflowmetry test if it's not normal we need to do cystoscopy he said . I too tablets for 20 days but no improvement and sometimes the problem is severe so consulted another urologist he asked me take RgU after seeing that he said everything is normal and said I have psychological problems.he asked me to take another tablet named alfoo and asked me to come after ten days I need one solution I am not able to concentrate on my work.