The best way to tell is a pregnancy test.

The only sure way is to pee on the stick! You will hear a million supposed early warning symptoms, but nothing will be as clear as a home pregnany test.

Chelle05 & JoMac have it right... take a pregnancy test. U can search the internet and see the top 10 early symptoms of pregnancy but all of them can be related to many other things. like missing your period can be due to stress in your life, change of diet, increased excercise. swollen or growing breast can be due to natural changes in your hormones. There really isnt any sure way to know but to take the test. best of luck & let us know..

Take a HPT the day of or after your missed period. And if you come out positive get in touch with you ob/gyn. After I took a HPT I called my doctor the following week and told them I wanted a blood test to confirm, and they did.

Like Chelle05 said, a pregnancy test. And if you are still unsure you can go to the doctor and get one done or a blood test. But, the common pregnancy symptoms are:
*Missed period.
*Moodiness.
*Breast tenderness/soreness.
*Frequent urination.
Although those are symptoms, they are not always a sure sign. Really, your best bet would be to do a test with your first morning urine. Good luck and I hope you get the results you want :D

pregnancy test for starters, but you have to go to the doctors so they can do the blood work and ultrasound to make sure.

Blood work.... I peed on 10 sticks at home (obsessive I know.. but I just knew I was preg and was not about to stop til I got a positive lol) and finally on the 9 and 10th I got a faint positive.. of course I went to the docs and peed on a stick... got a negative. Went home, peed again, got a postive. Went BACK to docs and demanded a blood test and got a positive! Moral of the story, a blood test is really the only method I trust. Good luck!!