False Negative with First Response - Common?

So I took a First Response test today (the kind that can be taken 6 days before your projected period) and got a negative. My period is supposed to start in 6 days.

Do you think the result is accurate this early? I can’t really find another explanation for my incredibly sore boobs because they are just on another level LOL have any of you gotten false negatives from this test? Any chance I could actually be pregnant and it’s just too early? Thanks!