I need help!

So I need advice, I got a period twice less than 2 weeks apart in May. Well all of June I've been having every pregnancy symptoms such as; fatigue, starving, smelling stronger, back pain, sore breast, shortness of breath,acne, moody, and to put the cherry on top of all of this June 21st I went to the bathroom and noticed i was having light bleeding so i thought *implantion bleeding*. However it stopped the next day, and I've been taking pregnancy test every week since then and all are negative, what does this mean ?