C# delaying command

So, im making a simple game, and when the character comes to the corner, he changes the direction, whats happening is that it lags when its in the corner, and i want to delay an if command, if its true, wait one second, then check if again...First i only had onwall, and grounded detection, then i added corner detection hoping it would solve the laging in the corners..

             grounded = Physics2D.IsTouchingLayers (mycollider, whatisground);
     onwall = Physics2D.IsTouchingLayers (mycollider, whatiswall);
     cornered = Physics2D.IsTouchingLayers (mycollider, whatiscorner);
 

     if (grounded || onwall) 
     {
         candoublejump = true;
     }

     if(cornered && onwall && grounded)
         {
             moveSpeed = -(moveSpeed);

         }