Wellness greetings to you..
If you had your periods (Monthly cycle ) recently or having now,mood swings could be a reason .Other than that quality of sleep plays major role .These are temporary,try to eat well and have quality sleep .Still if the symptoms persist ,do consult for further guidance.
Next Steps
Do go for a counselling session,if you feel something is burdening.
Health Tips
Practice Meditation,Reduce screen time.