Your mum would be the best person to talk to, can you talk to her?
Sounds like anxiety panic. Is there something bothering you ?
Hey, hey, hey, people -can we not scare kids? Talk to your parents about it and if it persists see a doctor.
You could try an arrangement of pillows so as to sleep in a more upright position. Have you been experiencing any other signs like a headache or cough? Two weeks is a long time to feel unwell.