how far late are you? If you were using protection, and he didn't ejaculate while inside you, you are most likely not pregnant. If this is such a concern for you, perhaps you should consider not having sex at all until you are more comfortable with the possibility of becoming a parent.
that is because the other 25 the night before did not use a condom, he he he he . The cramps are just down to your muscles getting used to so much hard work
you literally used protection EVERY time? sounds like the condom must have broken. if you're late for more than 1 or 2 weeks you're probably pregnant. just get an at home test and if it's positive get one at the doctor's then go along with your pregnancy. it'll be fine. once you see how sweet and innocent cute little babies look on the sonogram picture you'll be okay lol