6-7 days late help please new here

Tawanda
Hello everyone I'm new to this an in need of some help I'm about 6 or 7 days late I'm usually no more than one or two days late or on time I'm having some light cramping and a light discharge and headaches on and off this has never happened to me before I have took 3 test this week all were negative I guess I would like to know could I still be pregnant and I think I may have took the test too soon if so how long did you wait before taking a test and getting a positive answer