Obviously, being a guy, I know nothing about the inner workings of the female body and mainly think about cars and s*x all day but here are my observations.
You seem to be having the self-same symptoms that my girlfriend had and she is 11 weeks pregnant now.
No period - Well, the time of the month where I normally have to go without seemed to be taking longer to arrive. No complaint from me. :).
Sore Chest - Wasn't allowed to go near them at all!!!
Sickie feeling - Not actually throwing up but would definitely feel queasy without explanation.
She also felt tired all the time too.
Keep trying those tests, am sure you will get the news you want very soon.
Fingers crossed.
K