I would think, like others said, that a new panel might be in order.
But, and maybe I'm stating the obvious, you probably just cant upgrade
from say a 100A to a 200A pannel without also upgrading the main
service wires. Not a job for you most likely.

No one has suggested adding a sub pannel. If you are not over loading
then that may be OK.

My advice is free, take it for what its worth.