What should I do?

So for the last week I have had just about all the signs of pregnancy I had with my first. The tender breasts, VERY emotional, snapping at people for stuff I wouldn't usually snap for, pee alot, heatburn, indigestion, mild cramping (usually with AF i cramp either the day before really bad or the day of but never throughout), lack of appetite, I have excess saliva also, like to the point I need to spit. I'm constantly swallowing and having to drink something because i get tired of tasting my own spit. AF was supposed to arrive on Thursday. Usually it is VERY heavy. I usually go thru 5-6 pads a day and it last between 5-7 days. I starting spotting on Wednesday and lasted til last night. I went thru maybe 3 pads a day and it was just because I hadn't changed it in a while and wanted a fresh one. I feel I am pregnant but I have taken SEVERAL pregnancy tests this week and they all say negative. Is it too early for urine tests? Should I go in for a blood test? I'm so confused. I'm pretty intuned to my body and know when something is going on. When I had these symptoms before I took a test and it immediately came up positive. But I was about 3 weeks along.