Hello dear,
I understand your concern.
In my opinion there are various causes for
irregular periods like thyroid abnormalities,polycystic ovarian disease(PCOD),
overweight,obesity,stress, anaemia etc.
If there was any
pregnancy it would have shown up by now in the urine pregnancy test.
So sorry the chance of pregnancy might not be there.
I suggest you to rule out the above said causes of irregular periods.
The investigations like thyroid profile,
ultrasound,serum
prolactin might be essential for diagnosing the condition.
Weight reduction in case of overweight or obesity are helpful.
Avoid stress if any.
Once the cause is treated cycles become regular and the pregnancy chances increase.
Relax.
The increase in size of breast and abdomen might not be related to pregnancy.
Hope this helps.
Best regards...Dr.Srilatha