I'm 10 days late, have lower back and tummy cramping, also mood swings, fatigue, nausea, gas, craving, increase in discharge with two hpt reading neg?

Not pregnant. It sounds after 2 negative pregnancy tests like you aren't pregnant. There could be an imbalance in your hormones causing this delay in your period. The symptoms you describe sound a lot like pre-menstrual symptoms (which are a lot like pregnancy symptoms, hence, the confusion for many women). See doctor if period still not coming. Birth control pills can help regulate cycle, best wishes.