Confused

Liza
Yesterday I took a pregnancy test just to see. I made a little mess and just wrote it off. Later that night on a whim I pulled it outta the trash and realized it was positive! I got so excited but felt like I should take another one just to be sure. Well I did and I came out negative. Then this morning it seems like I may have started my period almost 4 days early. I'm so confused, and ideas?