Period or implantation bleeding?

Cassandra

So I was supposed to get my period on the 18th. The 17th I had a little blood when I wiped that morning. So I was like okay it’s coming a day early it does that every now and then. When I went to change the tampon later that day there was like spotting blood not even enough that I probably didn’t need a tampon. But I didn’t trust my body so I put a new one anyways. Well from the 17th to the 20th that happened. Ive also taken 2 tests and both were negative. Would you consider that a period or implantation bleeding. My body has officially confused me.