Period 5 days late...

I am 26 Years Old, I had my youngest daughter 2 1/2 Years ago. I've had my period every single Month since until now. I am 5 days late (from what this tracker said while the others says I'm more than 5 days late). I've taken pregnancy test, they all say negative and every now and then I'll have cramps. So I'm not sure what's going on.. I don't have insurance ATM since I'm not full time yet and my job, but everything has been closed because of the weather. Has anyone had this before?