3 days that menstruation is late, I'm feeling ...

I am 18 years old and since when I started to stay with my boyfriend I have sex without condoms and I do not take medicine. The last time we had sex he came in and I did not take the morning-after pill. Now I'm worried there are 3 days that menstruation is delayed and I'm feeling some pains in the belly as if they were cramps. can I be pregnant?
Expert answer:

You may be pregnant. Menstrual delays for the purpose of mistrust of a pregnancy only if they are superior to 15 days and its cólicas can be due to the delay because it can be that the menstruation comes at any moment and this can generate the colic.