Starting to loose my will power!

Af is expected on the 1/31 and I've been cramping since the 17th and my boobs r sore.....not overly sore but noticeabley sore.....and I feel slightly heavier down there! I told my self not to test til at least the day of a for 2 days later.....yet I can feel my will power fading....PLEASE some1 encourage me to not test...I'm so worried if I do I'll get a BFN!!!!