Hi,
I'm 33 have two kids... I can't even remember the singns I had then and I'm older so my body has changed since.I am 27 day cycle always without fail... I have a partner who we do not use protection but does not *** inside me (pull out method)... I missed my period on the 27th... I am not under any stress, haven't been ill, weight is same or been on any type of birthcontrol as well as any meds. I been feeling a little nauseous no cramping like usually have or tender breast which I normally would have before my period. Today I began to have a brownish liquid substance. Could I be pregnant?

While anything is possible, especially without using any form of birth control... the withdrawal method should never be considered a form of birth control as there is still sperm in the early seminal fluids that occur before ejaculation, it is still likely that you are beginning your period.

You see, even for the most regular woman, periods can be out of whack every once in a while for no apparent reason.

The best thing I can say is go to the doctor. Its sounds like it could be a chance. But you need to go to the doctor