blueToothSerial.begin(38400);
In most cases you won't have success with the SoftwareSerial class and baud rates higher than 9600, with picky devices even 9600 is too fast. Use the hardware serial to communicate with your Bluetooth device and the SoftwareSerial for debugging, the only drawback: you need another USB2Serial device like the USB2Serial Light from Arduino or an FTDI cable.