now the chance is clinically nil.
Thanks for the follow-up.
Now you have added more things to your medical history.
* With protection you mean to say that condom was used along with Unwanted 72 next morning.
* You have history of irregular cycles.
* Four HPT came negative.
All These put together makes chance of getting pregnant to NIL.
may lead to difficulty in conceiving in future, so its actual cause should be found out and treated.
Now coming to your other queries.
If you don't ovulate in a particular month then clinically there should not be any periods(leads to irregular periods), but in many cases anovulatory bleeding occurs which is a cause of concern.
Anovulatory bleeding varies in flow, duration, and schedule, and often is mistaken for a menstrual period.
Causes of delayed or irregular periods may be:
Polycystic Ovarian Syndrome
Strenuous physical activity
Extreme emotional stress
Above mentioned symptoms may be due to others causes too, other than early signs of pregnancy
also causes pain and fatigue.
I advise you to go for some investigations and clinical examination by an OBS/GYN to find out the actual cause. As at present it is difficult to comment on the cause.
Hope i have answered your query. You may close the discussion if you don't have further query.