Period , or NOT a PERIOD?🦋🌸🤦‍♀️ PLLEASE HELP ME!

So this is quite confusing.🤦‍♀️

I had my period in Aug. It ended around the 2nd.. so i figured that Id have to ovulate around the 11th.. and then my period would start again on the 25th. I dont have irregular periods or anything. And i go for checkups regularly.. 🤗🍃

But myself and my S/O had intercourse the day before my ovulation. And we used no FORM OF BIRTH CONTROL whatsoever.🦋🌼

What is the confusing part is that i had to start my period on the 25th of AUG. BUUUUUT , I ALREADY had it at around the 19th!

And my period (that i had to have on the 25th) is still not here?! Should I STILL take a test.. was the period i thought was a period not a period?🤔🧐🌺

Please help me out here , thankkk youu. 🤔🧐🦋🤦‍♀️