In one lower leaf I see leaf miners. Since leaf miners are non-specific insect larvae, you probably have something else. I can't speak for the curling and discolored leaves unless those are the insect ones. Get yourself a magnifying glass.
Also, leaf miners are like cockroaches: There is never just one. Be prepared for more unless you treat. Listen to these other good folks for that. I sprinkled a pack of wild flowers in a big pot on my patio. The thing was lousy with aphids and leaf miners. Once the marigolds popped up all the bugs went away.