Hello dear,
I understand your concern.
In my opinion there is risk of
pregnancy with pull out method because the precum might also cause pregnancy rarely.
And the sudden withdrawal might not be possible sometimes.
Iam not saying it is not effective iam just trying to tell you that it might fail sometimes.
Anyway just the symptoms like
motion sickness,appetite changes do not suggest pregnancy.
Because
stress regarding the thought of pregnancy also might make one to feel pregnancy symptoms.
That is why the pregnancy needs to be confirmed by doing a urine pregnancy test.
The first sign of pregnancy is missed period.Other symptoms like vomitings,
nausea,increased urination,sore breasts start 2 weeks after missed period.
So if at all there is missed period I suggest you to do a urine pregnancy test a week after missed period.
So relax.And avoid stress.
Hope this helps.
Best regards...Dr.Srilatha