Concerning?

Hey. FTM is this may be a dumb question, but I’m just wondering. My 5 month old has had a stuffy nose for a few days now. Didn’t notice last night, but tonight I noticed some snoring as he is sleeping (never had it before). He doesn’t seem to be having a hard time breathing and he isn’t acting any different. He is sleeping more but I think it might be a growth spurt. I notice the congestion most when he is sleeping or eating. Should I be concerned? I would guess he’s fine as long as he’s acting okay and doesn’t get a fever (doesn’t have one now), but with flu/RSV season starting, I’m just wondering when I should start getting worried.