So I have not missed my period yet but I'm not suppose to have it for until nov 17 ish. Me and my boyfriend use a condom every time but I am not on birth control yet, he claims he pulls out just in case. I am just worried because today I woke up dizzy and nauseous and I have heard that is a symptom... so what are the chances? PLEASE HELP ME CLEAR MY MIND! :confused:

If the condom was used correctly... put on before any penetration at all, not allowed to slip off, etc. your odds are fairly low. It certainly can happen, but birth control offers good protection for the majority (again, when used correctly everytime).
Anytime you have sex, you will have a chance of becoming pregnant... you just increase or decrease those odds in the choices you make. Good idea to include a spermicide with the condoms or consider another form of birth control along with the condoms if you want to decrease the odds of an unplanned pregnancy even more.
The dizziness and nausea could be from a stomach bug, inner ear issue, etc.. See what happens when your period is due, but try your best not to stress over it.

No contraception is 100% going to protect you from getting pregnant.The condom may of broke, or there may have been some sperm on the outside of the condom (it only takes one remember!) The best thing you can do is take a test after your period is due.You could do one now, but it is unlikely to show a true result until at least 2 weeks after you fell pregnant. The dizzy thing could be from your nerves about it, don't worry until you have done a test!