Got antsy couldn’t wait :(

We’ve been trying for a little while now and one night I woke up with sharp cramps and I was spotting very light pink and since then I’ve been nauseous and fatigued and sooooooorrrrre swollen breasts and darkened and sore nipples and many other symptoms as well. I’m still 8 days away from when I should start my period but I couldn’t wait so I bought a 89 cent test and ran home to see waited 3 minutes and was greeted with a BFN :( I know it might just be too early but it bummed me out