Started period on the 14th. had unprotected sex on the 14th. period lasted 5 days. then again on the 23rd started spotting the 30th. could i be prego?

Pregnancy test: Pregnancy is known to have occurred from sex on any and all days of the cycle. If you miss your period by 4-5 days, do a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time.