This never happen to me

Marieee

I had sex on the 25th of August, and yesterday witch was the 9th.. he ejaculated in me both times And Im late 3 days of my period it was suppose to come on the 7th, I checked to see for my fertile days it said August 19th-27th. I took a tesyt on the 8th and today witch is the 11th they both were negative is it to early ?