Pregnancy symptoms can start as early as conception, although they usually dont. You have a very high chance of being pregnant, but worring about it may cause you to have pregnancy symptoms even if you are not pregnant. I would take a test as soon as you have missed your period but with some of the more expensive tests you can test as soon as a week before your period. My advice is to take the test with the first pee of the morning, it is the most concentrated so if you are pregnant the hcg hormone will show up better. I would also tell you to pee in a cup and then dip the test into the urine, hold it there for about 10 secs and then wait to see if your preggers. With my tests the positive result was almost instant. Good luck and I hope everything works out for you.