Period is 6 days late. All negative tests. What do I do? (Read description)

So, I’m 6 days late for my period. I’ve taken 6 tests & all were negative except two (the 1st & 2nd one I took); it was a faint positive but it was a positive nonetheless. Every test since then has been negative. My boobs hurt, I’m more tired than usual, I’ve been getting nauseous, I’ve been having cramps... I have pregnancy symptoms & I’m late but I’m not bleeding or getting a positive test result. I’m NEVER this late except for when I was pregnant with my daughter. A day or two at most but not 6 days. I’ve completely missed my period... I’m just scared & don’t know what to do.