Could I be pregnant?!?

Lately I have been feeling VERY queasy! It happens everyday but not ALL day, it comes and goes...one minute I will be fine and the next I feel like I need to run to the bathroom. While I do feel queasy, there is no vomiting. Also I have been sleeping as much as possible. The next thing is I have been VERY irritable lately, everything and anything makes me angry...and that is VERY out of the norm for me. I did take a pregnancy test last week BUT I'm not expected to get my period til THIS week so I do realize it was early. My are not tender and there is no darkening but my husband did say they look a lot bigger than usual and I have noticed that my bras don't fit anymore. My appetite has changed greatly but I'm not craving any weird foods. This seems to be all my symptoms that I can think of. If you have any more questions just ask. This would be our first kid and so we aren't quite sure what to look for and I'm a little embarred to go into my doctor RIGHT NOW because I have NOT had my period yet :S. So PLEASE help. Any advice will be greatly appreciated. Thank You.