What's wrong 😞

So I have a short period(5/24) I thought I was pregnant,because she didn't show up the 3rd day I had brown discharge (thought it was implantation bleeding) so I put a panty linear on since that day nun happen so today 5/29 I had light bleeding put another panty linear on.i just want to know what should I be aware of.haven't taken a pregnancy test yet because I really haven't had any symptoms....Help Anyone.?