Just someone help

So I've never had an irregular period. My cycles are always 30 days. My periods last for 6 days. And That's always correct. I went on here and 4 different sites to see if maybe I messed something up. But I didn't my period is supposed to start on the 6th of June. I got some light spotting a week before. And then it just stopped the next day. Light spotting again but it's would get lighter than go back to just being light. I woke up in I wouldn't say severe pain because I'm a Baby when it comes to pain. But I woke up in a bit of pain. And almost like a light period. And I'm just wondering what it is. Every site I Check says it could be implantation. I had unprotected sex on my Most Fertile day. And he came in me but idk.