Pregnancy

I had unprotected sex & we didn't use the pullout method twice on the 2 days that I'm the most fertile. My period was already supposed to be here 5 days ago. I do have unregular periods but never a week late. I have been pregnant before but I always got my period while pregnant until I was 5 months then I stoped bleeding. I wanna find out as soon as possible, but I don't wanna be disappointed it I go get a test& it has a false negative. I want to find out if I could be pregnant.  I need to know when is too soon to tell but I also can't find out too late. Please help& give me opinions