Packet Loss when using QtSerialPort

[SolarSunrise]

I'm making a program that reads a stream of data coming from a serial RN42 bluetooth connection at 250 samples per second (115200 baud) and saving it to a file. When running the code, I've noticed that some of the data were being dropped not and read, thus getting out of sync.

@SerialMonitor::SerialMonitor(QObject *parent) :
QObject(parent)
{

// Initialization here

 DAQ = new QSerialPort(this);
 DAQ->setPortName("/dev/tty.BIOEXG-SPP");
 DAQ->setBaudRate(QSerialPort::Baud115200);
 DAQ->setDataBits(QSerialPort::Data8);
 DAQ->setParity(QSerialPort::NoParity);
 DAQ->setStopBits(QSerialPort::OneStop);
 DAQ->setFlowControl(QSerialPort::NoFlowControl);

 if (DAQ->open(QIODevice::ReadOnly)) printf("Success!\n");
 else printf("FAILED...\n");

 connect(DAQ, SIGNAL(readyRead()), this, SLOT(WriteToText()));

}

void SerialMonitor::WriteToText()
{
while (DAQ->canReadLine()) {
QString IncomingData = DAQ->readLine();

    // More processing here

}

}
}@

Is there a problem with my code? If not, is there a way around this problem? This is an EEG device thus every single data point is crucial.

Thanks in advance!