Hi Doctor, I Been Having Stranger Feeling. My Feeling Was

Hi doctor, I been having stranger feeling. My feeling was like I eat a lot lately and get hungry a lot too, I'm also tired, have headache, stomach hurt a lot, and blood come back and forth which I don't get it. My parent said I was pregnant I said no but I did the pregnancy test it turn out like a faint line and than later the faint line just disappeared. Help me explain please.