Cervix position?

I got a faint line on the 7th but af wasn’t due until the 12th, on the 9th I got a negative . On the 12th my cervix dropped really low and was hard and I thought I started my period a few hours later but it was more like spotting (possible implantation?) and then it stopped before the end of the day. I figured it would start up again considering I NEVER spot , but nothing and my cervix moved back up barley reachable , soft , and closed again. Has anyone else ever had their cervix do this ? I’m testing again tomorrow wish me luck 🤭😬