Miscarriage/chemical pregnancy

Tara
Ok so I have a question.  Last month I started my period early or at least I think it was my period, but it was very light and only last three days. Right after that I was feeling nauseous in a way I hadn't felt before so I decided to take a pregnancy test. I took one of the clear blue pregnancy tests that tells you how many weeks pregnant you are if you are pregnant. Well it said I was pregnant 1 to 2 weeks, but I took four more tests just to be sure and they all said I was pregnant.  Then two days later I started spotting and then spotting became bleeding heavy for four days after that I took another pregnancy test and it said not pregnant. Has anyone experienced something like this?