"feeling concern" is correct and usable in written English.
You can use it when you're expressing a sentiment of worry or apprehension, such as "He looked around the room, feeling concern for his friend's safety."
"Sympathy is feeling concern or sorrow for the other person".
I remember standing at the edge of the boat and feeling concern about how I would breathe underwater.
Ms. Brown, who has her own cosmetics line, admits to feeling concern over her own appearance as she turns 50.
The patient limit is an arbitrary number imposed by legislators, again feeling concern for adding another potentially addictive opioid to the market.
He could not witness this without feeling concern for the child's welfare within his heart-and-mind, though this feeling would not necessarily move him to perform the moral act of attempting to save the child.
The "chaos" at Westminster had left Irish people feeling "concern, frustration, worry and dismay," she added.
For example, if I notice changes in my body temperature, breathing rate, how strong I feel or even my tiredness, I can explain these without feeling concerned.
They never stop feeling concerned about me but do not interfere.
Shamos continued, with feeling, concerning the Votomatic system, "Counting paper ballots is no picnic.
Another audience member asked him about comments he made about potentially feeling concerned about living next door to a group of Romanians.
The police officer in question later came to Clayson's office and said he was taking pictures around campus to find out what students were feeling concerned about.
