Symptoms?

McKaela

So I have four period calendars that say I'm 4-5 days late and four that say I'm 1 day late. My lower stomach and back have been hurting so bad on and off all day for probably 2+ weeks. I was constipated for 1 of those weeks. I've been more hungry and I feel like I'm peeing more. I have taken a few tests and they've been negative. But with my first the test was faint. So question is can these be symptoms or is my period doing something weird?