No Period. 1 week. Negative PT

So I usually start my monthly cycles anytime from the 15-17th and I haven't started yet almost a week since my missed period and I have taken 5 PT all Negative! I don't have Pregnancy symptoms or AF only thing is I am very tired and sleepy out of the blue! Like crazy sleepy! We've been trying for 10 months now. I was on BC for 1 year 9months but ever since its been out I've had regular AF. Should I do blood pregnancy test? Have you lady's been through something like this? I do also have medium creamy discharge?