You are suffering from irregular delayed period with presence of PMS (Pre Menstrual Syndrome).
Reasons are ovarian cyst/ PCOD (most common) with co-existence of hormonal
imbalance, stress/ anxiety, thyroid
problem, wt gain/ extreme loss, irregular eating habits etc.
Here, you need to consult with gynecologist for relevant investigation like USG abdomen and other hormone assay, blood sugar & prolactin
level etc. Proper treatments depend on causative factors. Hormonal medication is the key to regularize your period along with taking anti spasmodic drugs (like drotin or meftal spas
etc) can give symptomatic relief.
Do these things- Avoid stress/ tension by regular deep breathing, take healthy diet with Vitamin & iron supplements
, eat more vegetables & fruits, drink more water, keep bowel habit regular, control body wt by regular exercise and need proper sleeping.
Be well & take care.