I had unprotected sex with my boyfriend on Saturday, and he went inside of me...We are planning to go get the morning after pill today, But ever since then (esp. today) I am having cramps (feels like menstrual cramps) but no bleeding, spotting, or anythign liek that...My normal cycle ended on the 5th of this month, so im no where close to starting, but it feels that way!! Can I be pregnant and already having these feelings?? Also, my back is killing me! (lower back! ) I just didnt know if maybe it was planting itself or something?!