### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Last normal period started August 31st. Then noticed lighter red bleeding 8 days earlier than was intended in September on the 23rd and then in October on the 19th, the same thing happened and in November on the 15th, the same thing again..all lasting only a few days..my duration runs 5-7 days and these were 2-3 days..there has been tenderness in the breasts, heaviness in the abdomen , irritability , moodiness and crying a lot and recently (last couple of weeks) some light fluttering on my right side..took 1 pregnancy test that came up negative..then took 2 a little more than a week later that came up positive.. I am wanting to know from when should I calculate by to figure out the due date being that I had this happen..I was told they go by your last normal period. I have been looking for answers and there just doesn t seem to be a straight forward one..

### output:

Hello, You are suffering from irregular period/spotting along with Pre Menstrual Syn Chat Doctor. Several reasons of irregular period like hormonal imbalance, stress/anxiety, ovarian cyst/ POD, thyroid problem, wt gain/extreme loss, irregular eating habits etc. But first exclude pregnancy by doing blood test for B-ChatDoctor. Need to investigate properly to rule out underlying pathology by USG lower abdomen, Thyroid profile, LH/FSH, blood estrogen & progesterone level, PPBS etc. So consult with your doctor and take suggestive measures. Avoid salty food/coffee in 2nd half of period, Avoid stress by yoga/deep breathing, Control body wt, Take healthy diet, Use Tab FLUOXETINE 20 mg OD with Cap PRIM OSA 1000 mg daily and wear tight breast support for some relief, may need OCP/Progesterone pill, maintain personal hygiene and need proper sleep. Be well.