[Astrophile.]

Have you experienced another other stressors in your life that could cause your period to be late? Have you changed your diet or exercise regimen at all? Things like that can cause a period to be late, as well as anxiety or nervousness.

You're doing everything right. You took Plan B, you waited to take a pregnancy test, and it came up negative. I'd give it a little while longer and see if you get your period. Because you've gotten negative pregnancy tests, you're probably not pregnant and there are probably other reasons why you're not getting your period.

Don't stress out too much. If you are concerned, go to your doctor and ask for a pregnancy/blood test and tell him that you are late on your period (but only do this if it is extremely late, you don't want to waste your time).

I hope this helped. Feel free to get in touch with me for any questions or comments.