Lockouts, utility shutoffs, and removing your belongings are illegal 'self-help' evictions almost everywhere. Paste any notice you got for a read.
A landlord must give proper notice and go through a court process; a sheriff — not the landlord — carries out a legal eviction. Locking you out yourself is illegal.
Document everything (photos, messages), know it's likely illegal, and contact local legal aid or tenant services right away. You may have a claim against the landlord.
No. Self-help lockouts and utility shutoffs are illegal in most places. Only a court-ordered eviction enforced by a sheriff can remove you.