Implantation bleeding?

Chelsea

So I came on my period 3 days before the expected date which is today but it’s seems different than a normal period. It’s a lot lighter than usual and sometimes when I wipe there is no blood. I took a pregnancy test on the day that I started this period (so 3 before period expected date) and it came back negative. I also haven’t had the usual period pain it’s been a lot easier than normal. But I just have this feeling that maybe I am pregnant, feeling sick, stomachs feeling a little off. What does anyone think ?