Pain in bladder area, bladder feels full but not much urine comes out + weak stream. no frequent urination but when urinate feels pain.

Here are some ...: You need to be checked out if you have UTI or inability to empty bladder or to hold urine with detailed general Hx/ voiding pattern/ lifestyle, etc., physicals, urinalysis, residual urine check, etc. so to deduce possible causes before proposing reasonable Rx/care. So, go to seek urologist timely; online inquiry and guess would not be enough to pinpoint your current urological concerns.