If statement not working with external button

Hi Group, I am having trouble executing my code in my if statement for when my button is activated (buttonPin == LOW). I am reading the button is pushed in my serial port and I can see when I press the button the value changes to 0 or LOW but my if statement will not execute for some reason. Please help.

#define buttonPin 9
#define stepPin 3
#define dirPin 4
#define LimitPin 8
#define LedStatusPin LED_BUILTIN

const int PulsesPerRevolution = 3200;
const int feedTimer = 10000;
byte feedCount = 1;
unsigned long currentMillis;
unsigned long timerMillis;

void setup() {
  
  pinMode(dirPin, OUTPUT);
  pinMode(stepPin, OUTPUT);
  pinMode(LimitPin, INPUT);
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(LedStatusPin, OUTPUT);
 
  delay(2000); //delay after first plugged in to give operator a chance to acknowledge led light flash to confirm boot up
  Serial.begin(9600);
 
  //show user board has booted up by blinking LED twice
  for(int a = 0; a < 2; a++) {
      digitalWrite(LedStatusPin, HIGH);
      delay(1000);
      digitalWrite(LedStatusPin, LOW);
      delay(1000);
  }
}
 
void loop() {
currentMillis = millis();
if ((currentMillis-timerMillis >= feedTimer) && (feedCount <= 3)){
    for (int i = 0; i < 3*PulsesPerRevolution; i++) {
      digitalWrite(stepPin, HIGH);
      delayMicroseconds(50);
      digitalWrite(stepPin, LOW);
      delayMicroseconds(50); 
    }
    timerMillis = currentMillis;
    feedCount ++; 
}

Serial.println(digitalRead(buttonPin)); //diagnostic only in my code so I can see what the status is of buttonPin

//this is the start of auto return to home if button is pressed
if (buttonPin==LOW){
 Serial.println("button pushed to spin ccw");
    //spin CCW until limit switch is activated
    while(digitalRead(LimitPin)==LOW){
        digitalWrite(dirPin, HIGH);
        digitalWrite(stepPin, HIGH);
        delayMicroseconds(1000);
        digitalWrite(stepPin, LOW);
        delayMicroseconds(1000); 

    }
    Serial.println("limit switch active");
    //Change direction of Motor to CW
    
    //Spin CW until limit switch is deactivated
    while(digitalRead(LimitPin)==HIGH){
        digitalWrite(dirPin, LOW);
        digitalWrite(stepPin, HIGH);
        delayMicroseconds(2000);
        digitalWrite(stepPin, LOW);
        delayMicroseconds(2000);
    }
     Serial.println("limit switch not active");

    //Go to home position after limit switch is released
    for(int x=0; x < PulsesPerRevolution; x++) {
        digitalWrite(dirPin, LOW);
        digitalWrite(stepPin, HIGH);
        delayMicroseconds(1000);
        digitalWrite(stepPin, LOW);
        delayMicroseconds(1000);  
    }
} 
}

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