What Causes Frequent Urination Along With Swelling In Knees And Ankles?

Hi Doctor, Well I m a 21 yr male and I ve been having frequent urination since more than one year now. I ve been to many physicians and some have told me its an urinary infection and others told me its due to stress. I ve taken antibiotics given by the physicians and in the early stage I think the bathroom lessened quite a little but afterwards it became the medications were doing their job cause my urge to go to the same and the antibiotics didn t have any effect. I now have to get to the bathroom every 10 mins. I ve also got some joint problems (since more than one year also). There s some swelling almost everyday on my knees, ankles, shoulders, wrists and forearms. There s not much pain but my joints seem to be a little weak and crack a lot. I ve been to another physician recently and done an X-Ray and some blood tests: Haemoglobin 14.4 g/dl. He does not seem to find anything wrong in me either but I ve been prescribed some other drugs: Respas-10-(Dicyclomine Hydrochloride Tablets) and Ultraflox-500. The only diagnostic I ve been given for my joint problems till now is juvenile arthritis. Are these prescriptions good, will they not affect my joints in any way? And do you seem to find the cause of my conditions?