Cervix closed

I got my implant may 15th. Had sex may 30th. I have only spotted this whole time on june 3rd and i only noticed it when I used tp to check my cm. I'm suppose to start today, june 6th, which is seven days after the sex mentioned prior. I took a test and it was NEG. My cervix is very low/med, but feels closed. should I be worried I concived?