Hello and welcome to HCM.
Palpitations at rest in a 25 year old female needs further investigations.
It may be related to anxiety,thyroid
Thyroid disorders may be associated with menstrual irregularities.Anaemia with fatigue,reduced working capacity and pallor.
If I were your doctor,I would recommend,
-Investigations like blood pressure measurement, blood haemogram,thyroid tests,electrocardiography
,blood glucose and blood lipids
-Destress yourself with regular yoga and meditation
.Listen to calm music or engage in some relaxing hobby.
-Keep your weight within control by balanced diet and regular exercising.
-Further management depends upon the results of the tests.
Hope this information helps.