Hi Jane,
I’m sorry that you had to go through all that. It most certainly appears that you got hit by something or rather someone.
To be on the safe side, change all your passwords to your accounts. And it’s probably best if you also go the nuclear route, that is, reset your iPad. Be sure you have a backup.
You can find the steps how to do this on Apple’s site here:
https://support.apple.com/en-us/HT201252
Hope this helps you out,
Kim