Frustrated and impatient!

Tracy
Hi there... Posting this is a shot in the dark, but hey!
My cycles are all jacked up and always have been. I average between 28/31 days between sometimes more sometimes less. First day of my last was oct. 15, lasted until the 21st. On the 28th had heavy bleeding (normal for me) for three days and now nothing. For the past week or so i have been abnormally nauseous on and off all day but getting worse at night. I actually ended up taking some tums and getting my butt to sleep! And my nipples have become more sensitive, not really the whole breast... But alas i have yet to start my period. The boyfriend and i have unprotected sex sparatically throughout the weeks but mostly the weekends due to our clashing work schedules... I took a test last night and i THOUGHT i saw a very very very *breath* VERY faint positive line. Decided to retest with first morning urine and that was a big ol negative. One of my friends told me her positive tests came at night so im just unsure. Other friend of mine who is a nurse told me to wait a week and test again if my period hasnt come. Im just impatient!!!
Opinions, friends?