H1b Amendment Approved after H1b Extension was

[LazyImmigrant]

My company filed for an amendment without an extension of stay about 14 months ago. While the amendment was pending, they filed for an extension of stay which was approved and I got a new I94 with an expiry date in 2021. Today I received the amendment approval with a I94 with a expiry date that matched the original I94 date which is about 3 months from now. 
Does my status expire 3 months or 3 years from now? If it is 3 months from now, are my only options to file for an extension again, or travel outside the country and then come back in?