You are suffering from irregular early period with pre menstrual syndrome (PMS).
First exclude pregnancy by blood test
for B-hcg/ USG lower abdomen though chance is very less.
Need to investigate properly to rule out causes like hormonal imbalance,stress/anxiety,ovarian cyst
, thyroid problem,wt gain/extreme loss,irregular eating habits etc.
Do some basic investigation like thyroid profile, LH/FSH, blood estrogen & progesterone
level etc and then consult with your gynecologist to take suggestive measures.
Use Tab DROTIN DS to get some relief from abdominal cramp
.Avoid salty food/coffee in 2nd half of period,Avoid stress by yoga/deep breathing,Control body wt,Take healthy diet,Use Tab FLUOXETINE
20mg OD and may need OCP/Progesterone pill,maintain personal hygiene and need proper sleep.