Please Tell Me About My Ultrasound And Urinalysis

Hello Sir, I have a question about my urinalysis: My ultrasound result last september 18 ,2010 are the following : My urinary bladder is thickened, no abnormal intraluminal echoes seen ! Normal kidneys and prostate gland . Last August 2010 my urinalysis result in microscopic is pus cell 2-4/hpf, RBC IS 10-15 /HPF, BACTERIA +2,AMORPHOUS URATES +1, SQUAMOUS CELL 0-2/HPF in short i have a UTI, after taking cifrofloxacin 1 gram/tab, i take again urinalysis last sept 2010 , and my RBC is reduced to 3-5/hpf, pus cell 0-1/hpf,squamous cell 0-1,mucus thread +3. after that i went to different doctor and prescribe me BACTRIM 400 for one week and the urinalysis result last october 2010 is rbc 0-1/hpf,pus cell , 0-1/hpf,squamous cell 0-1/hpf, urates +2 , the rbc or hematuria is almost zero . But when Christmas time arrive i feel little pain in my urinary bladder again so i take Bactrim 400 for almost 1 week and after that i take urinalysis last Jan 3 2011 and the reading is RBC 7-15/hpf, pus cell 0-3/hpf,squamous cell 1-5/hpf, bacteria +1,urates +1, mucus threads +1, in short even after taking bactrim 400 for 1 week i have still a hematuria , so i decided to continue take the BACTRIM 400 for another 1 week but i stop because i feel stomach pain and feel weak, little disturbance on my heart and up to now i still feel little pain on my urinary bladder, and i will take some urinalysis and check up tomorrow again. My question now sir is that my RBC/UTI is seems little bit persistent and my i feel little pain on my urinary bladder ? So the problem why my RBC is little bit persistent if my UTI if already ruled out last october 2010 it return back again before christmas and up to january , so sir whats your diagnosis and possible solutions to completely get rid on this problem. Thank you very much for your advice on this matter.