Logitech MX Anywhere 2 not working, Bluetooth is not present in settings or anywhere

I have an HP Notebook running Windows 10 and a Logitech MX Anywhere 2, which will not connect to my computer anymore.
When I got it, I plugged in the andapter and it worked just fine.
But I made a stupid mistake and connected it to my iPhone just to see if it would work. It doesn’t so I would advise you not to try it, but now when I try to use it on my computer it will not work. And when I go to settings and Bluetooth, the on/off slider is simply not there. Help?