Hi lizliz,
What steps did you take when you were trying to secure your laptop?
In regards to your saved passwords disappearing, that could be the result of one of two things:
- iCloud Keychain was disabled or removed, or
- If you reset your login password, those saved passwords were tied to your previous password, and thus lost (unless you can recover the original login keychain using the original password)
To reset your admin password, try these steps. I'm assuming your device info is correct and your Intel-based 13" MacBook Pro is running macOS Mojave (10.14).
- Start up in macOS Recovery: Hold down Command-R as you power on or restart your Mac. Keep holding the keys until the Apple logo and a progress bar appear.
- When the list of utilities appears, go to the top of the screen, and select Utilities -> Terminal.
- Type this command and hit Enter (Return): resetpassword
- Follow the onscreen instructions to reset your password.