My left ear is clogged from blowing my nose too hard. how do i fix this?

Reverse it: Try holding your nose and swallowing and see if that has an effect that actually can reverse holding your nose and blowing. If you still get no relief contact an ENT doctor.

Clogged ear: Usually this is something that resolves on its own, but it can take up to a couple of weeks. You can try to see an ENT who might be able to get it to resolve sooner. Some people take decongestants, but there is no good evidence that this helps. Feel better!