Period or Implantation

I got my period this month but it was earlier than usual which I assumed my cycle changed. My first 2 days were heavy & the blood was very dark similar to what I experienced after my miscarriage last month. The 3rd day my flow decreased & I had bright red blood then towards the end of the day & going into my 4th day I had creamy pinkish discharge then everything stopped & I figured my period was over. I’ve gone the entire day without any type of blood or discharge etc. now tonight there was twinges of red blood on my tissue when I wiped. It wasn’t enough to get on my underwear but it was definitely noticeable. I’m also having mild back & breast pains. What could this be??