Hello sir and welcome.
I should rightfully atart by saying that the withdrawal method is only 50 % effective, which means it has resulted in conception in 50 % of couples who follow the method.
As for the pregnancy
chances, a pregnancy test will have to be conducted using an early morning urine sample at least 2 weeks after the suspected date of conception or on or after the first day of a missed period. Before this, it will not be accurate.
Now coming to the symptoms, these could simply be due to a hormonal
change or a soon approaching period. You could wait for longer, for her normal period to arrive and if it is delayed, visit your doctor.
Hope this helps.