Period?!

Ta

So on May 1st I got some bleeding right before I went to bed and thought my period was going to start but the next morning I pull out the tampon to only find a couple of spots on it. I was supposed to start my period on May 3rd but no bleeding. Now today May 4th I got the same random bleeding with a little more cramping. Is this a my period or something else. My periods are pretty regular and when it starts it doesn’t normally stop like that.