MacBook Pro won't accept password after battery drain

Hello,

I just last week bought a MacBook Pro. Specs: M5, 14 inches, 16gb ram, 1tb storage, OS Tahoe.

Yesterday night it shut down because it ran out of battery (while I was not using it). Once I connected it to the power, it restarted and it is charging, as normal.

However, now it is not accepting my password! I am sure I am typing it correctly. I have even changed my password using my iPad. Still, it is rejecting any password, and not allowing me in. It keeps locking my account.

Does anyone have any idea what might be going on? Should I go to the Store to get help?

Many thanks in advance!