My prego test says negative. That means i'm not pregnant??? Right?

So my period is due cause i feel it coming i've had major cramps for the last 3 days its day 33 and it still hasn't come it was due 2 days ago..my legs get all trembly, bloating, sore boobs, My period came on the 25th of May and I had sex on the 6th and a week later i felt the same that my period was coming i was all bloated and sore. It was weird cause i only feel like this towards the end of the month. So i suspected i was pregnant i got headaches too. I've done 4 tests till than. They all came in negative....so it's just me??? Right??? i got the most expensive test and it's neg. My boobs feel like they will explode the funny thing is i get cramps and period feeling for a bit and than it goes away completly.