Late! Could it be?

So I have been busy over Thanksgiving and working and I haven't been on glow in over 3 weeks. This morning I realize I haven't started AF yet and I open glow to realize that I am 3 days late. My right breast has been hurting the last few days and when I think about it a couple of days ago I drank the rest of my sons grape juice because it smelled good and I hate grape juice. Could this really be it after 2 years TTC? I'm too nervous to test 😨