Hallow Dear,
Immediately on the next day of the unprotected sex,
pregnancy will have no symptoms what-so-ever even if the conception has occured. So you cannot attribute your cramping tom pregnancy.
Pull out method is not a reliable and safe method of
contraception. Before ejaculation of the sperms, pre-seminal secretions (precum) are deposited in the vagina unknowingly. Precum does contain some sperms which can impregnate the woman.
The earliest test you can perform for detection of pregnancy is
Beta hCG test on your blood. This test gives reliable results 10 days after the last
unprotected intercourse. Values more than 25 mIU/ml are diagnostic of pregnancy while in nonpregnant state, the values remain under 5 mIU/ml.
Alternatively, you may wait for the menses to appear. If you get your menses, you are not pregnant. If you miss periods, perform pregnancy test on the overnight morning first urine sample a week after the missed period; earlier these tests may report false negative.
I hope this helps you today.
Dr. Nishikant Shrotri