Tivic Health Systems Inc. filed SEC Form 8-K: Entry into a Material Definitive Agreement, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Termination of a Material Definitive Agreement, Completion of Acquisition or Disposition of Assets, Creation of a Direct Financial Obligation, Unregistered Sales of Equity Securities, Material Modification to Rights of Security Holders, Regulation FD Disclosure, Financial Statements and Exhibits