*** Possible TMI *** Baffled by what’s happening to me!

Ladies I’m sooo confused on what’s going on right now. So I had my period (usually a 34 day cycle) at the end of June, and my fertile week was at the beginning of July. . . . We inseminated once ( our donor is unreliable, totally a different and long story) anyways yesterday was 4 dpo and I had some blood exspell it’s self from my, I was like okay no big deal, but it’s still going and it’s not light either, it’s like a mini period?! That’s not supposed to be here for another 10 days!!! I though it was strange cuz I didn’t have any usual fertile symptoms, lots of Brest tenderness though. I haven’t had a 20 something cycle period in several years. . . .

Is this a period or still possible implantation stuff or a chemical pregnancy?!?? I’m so confused, and lost on answers.