Having noise in clock generated using TMR0 Interrupt :MCU::PIC16F73

void interrupt()
{
    
      os_cnt++;
      while(os_cnt<=5+feedback)
      {
        RC6_bit = 0;
        RC7_bit = 0;
        break;
      }
      while(os_cnt>=5+feedback && os_cnt<=85-feedback)
      {
        RC6_bit = 1;
        RC7_bit = 0;
        break;
      }
      while(os_cnt>=85-feedback && os_cnt<=90+feedback)
      {
        RC6_bit = 0;
        RC7_bit = 0;
        break;
      }
      while(os_cnt>=90+feedback && os_cnt<=160-feedback)
      {
        RC6_bit = 0;
        RC7_bit = 1;
        break;
      }
      while(os_cnt>=160-feedback)
      {
       RC6_bit = 0;
       RC7_bit = 0;
       break;
      }
      while(os_cnt==161)
      {
       os_cnt=0;
       break;
      }
      TMR0 = 200;                // Timer TMR0 is returned its initial value
    INTCON = 0x20;            // Bit T0IE is set, bit T0IF is cleared
 }




////////////////////
///////////////////
void main()
{
..................
............
while(1)
{


ADCON0=0b00000001;
          adc_rd0 = ADC_Read(0);
          avg_pwm = adc_rd0;
          while(avg_pwm>80)
          {
           if(feedback<50)
           {
            feedback++;
            //Delay_ms(20);
           }
           else
           {
            feedback = feedback;
           }
           break;
          }
           while(avg_pwm<=80)
          {
           if(feedback>1)
           {
            feedback--;
            //Delay_ms(20);
           }
           else
           {
            feedback = feedback;
           }
           break;
          }
          

}
}