Yes, if there is fissure it may explain your frequency hence it is worth getting it ruled out and treated appropriately.
In view of your complaints I would suspect you having urinary tract infection or urethral syndrome. Could you please consult a urologist and do not hesitate to get an endoscopy and urethral dilatation as they are routine procedures and may help you.
All I can see is that it does not appear to be a serious problem and you should be fine with the help of a well-trained urologist.