TTC.....

Hey all, my first day of my period was July 5 and it was a shorter period, well now I’m in my two weeks until I can test but I’ve been having so many symptoms like cramps, mood swings, and a lot of food aversions and what’s weird is I’ll be eating and when I’m almost donw with my food it hits me and ill get really nauseous. I took a test a few days ago and one came back positive but the line faded away before the test was even done and then i took another one the next day and it was negative. Dose anyone have any ideas what’s going on?