Ok I Was Ovulating Had Sex Forgot My Birth Control

Ok I was ovulating had sex forgot my birth control remembered the next day when I started to bleed so I hurried & took a pill the next week I forgot to take my pill again & the next day I stared again so I just let it go, I have a normal heavy period with bright red blood for bout 6 days. Its been 3 weeks since intercourse & I took 3 test all coming out negotiate but Im just wondering is there any possibility that I'm pregnant just a little nervous