Im going through the same thing!
Iv been having all the symptoms of being pregnant for almost a month now.
But all the preg tests I have taken have all come out nagative.
One of them looked positive, but it couldve been an evap line,
since I looked at it after the expiry time.
Iv been getting nausous, bloating,urinating more then often, constipation, sensitive breasts,more discharge,feeling more tired,headaches,back/hip pains,cramping and my period before was irregular!
And I just have this gut feeling im pregant, and iv been having dreams that I am too.
So if im not pregnant then something must be wrong..
But im going to try and get a blood test very soon.
I hope everything turns out for you, and hopefully ill find out soon as well.
=)