Welcome to HCM.
In some women headache is there during first month after insertion.
Headache usually not occurs with mirena
coil after 12 months.
Try to find out the triggering factor of headache.
It might be due to stress
,lack of proper sleep,heavy work load,beginning of migraine
Check your blood pressure.
Take nsaid to subside the headache.
Start b12,calcium,folic acid
Start medications under guidance of your doctor.