Hey Ash, first take a deep breath, both in and out.
Turn off at machine and wall plug. Take every cord out, and then replug them.Rethread the machine, and change the bobbin. Sometimes my Singer stops because the (plastic)bobbin has a small nick in it, another time I didn't plug the foot pedal in properly, and yet another it overheated on an extremely hot day, after about 20 mins of sewing.
Hope this help.