Hello dear,
I understand your concern.
In my opinion there are rare chances of
pregnancy.
Usualy there is scope for pregnancy when semen is ejaculated inside the vagina during the fertile period.
There is very rare chance when then semen outside the vagona resulting in pregnancy.
Byt anyway confirmation is done by a urine pregnancy test.
The test needs to be done a week after missed period if at all the period is missed.
The first sign of pregnancy is missed period.
Other signs of pregnancy like
nausea,vomitings,increased urination,sore breasts start 2 weeks after missed period Incase of pregnancy
Anyway overall the chance of pregnancy is very rare.
So avoid
stress and wait and check for the period.
Hope this helps.
Best regards...Dr.Srilatha