I took this this morning. My expected period is dec 12. But I've had lower back pain all week, just aching across. Tuesday I had severe cramps that felt almost period like. My fertility window ended Tuesday with Monday being my peak with 33%. I'm sure I ovulated because I had EWCM. If I am, it would be suuuuuper early and I'll have to retest next week or wait until period. What do you see??