Hello, I would be happy to help you with your question.
Given the delay in your period and the negative tests, this does not sound like pregnancy
. A test would turn positive within about 2-3 weeks after conceiving. It sounds like you have done tests since the times that you would have been at risk for pregnancy.
What you are describing is very common. One way to induce a period is by taking a short course of progesterone
10mg daily for 10 days). This could be discussed with your OB/GYN.
I hope that this helps! Good luck.