Missed period not pregnant!

Hey guys,

Looking for a little help or for someone to tell me they have gone through this before.

I have been on the pill for maybe 3 years now. I was on the implant before this !

So I have been training for a half marathon that I completed on the 15th of October . I was Maybe running a little more than usual 2 weeks prior to this , not much more though. I was also taking ibuprofen. The week before the half marathon I was supposed to start my period but it just didn’t come I had the week off the pill like I do every month and nothing. I decided I’ll just take the pill like normal after having a week off.

I’m worried sick that something is wrong with me. I’m not pregnant I didn’t miss one pill and I took a few pregnancy tests to be sure.

All I’m doing now is thinking omg what is wrong with me why hasn’t it come am I never going to be able to have children now. We was planning on coming off birth control in the new year’

Let me know what you think guys. Anxiety is going crazy x