Trying to conceive and wondering....

hey doc! so where do i begin? for the past week or so [maybe week and a half] i have been feeling really weird. I have frequent headaches, someties 3 times a day, and im always tired! I have been sleeping alot also. My breast are sore and the other night i notced they were leaking a clear liquid. But i was just a drop! I have this vicious thing going on with my stomoach where it will growl like no tomorrow right beneath my rib cage. I also felt some weird pulsating action going on in the area of my uterus. I had slight bad cramps today and yesterday and yester and the day before i had some yellow/brown spots in my underwear! Im supposed to start my period on the 26th or 27th and have already taken a pregnancy test that came out negative! But why am i feeling this way! someone told me i was having high progesterone symptoms. does that mean i am pregnant? Help me!