how long does it take for pregnancy symptoms to show?

how long does it take for pregnancy symptoms to show? I got off my period the 11 but had unprotected sex the 16th and 17th. He came inside me both days. Saturday was the start day for my "fertile" week. Ever since I woke up that Sunday morning after I haven't felt like my self. I've used the bathroom#2 more times than I can count this week and I have woke up this morning with the most uncomfortable cramps, they feel almost like period cramps. We're not trying, but we wouldn't mind if we had one either. (: