Confused.com symptoms negative test

Tash
So me and my partner have been trying for a baby, the last week or so I've felt really tired, mood swings, metallic taste in my mouth and just no energy at all. All my friends said I'm pregnant so I took a pregnancy test 2 days ago but was negative. I'm not sure if it was too early or if I'm not pregnant. But why these symptoms? Can anyone help please :)