Your agni has gone mandya(low) hence you are facing such issues...
Periods are not responsible for this ...you must have eaten something that didn't suit you !!
Detailed history taking is necessary
Consult first
Next Steps
Go for fasting...do not have anything other than moong dal Pani for next 2 -3 days...you will start feeling better and your symptoms will be gone
Health Tips
take full rest ... hydrate yourself...use hot water bag for stomach cramps