Advice !!!

Soooo felt kinda weird but I was willing to try the whole "period sex" thing. Sometimes it lasts 4 days & sometimes it lasts 5 & seeing as I was on my 4th day & it seemed as if I'd be having a day 5 I went along with it. Showered & normal routine 😏 Only to realize after he finished inside me there was no blood & my period was over ! Should I be worried? Or take a plan B or could I just be panicking?? 😓😓🙄