4 year old - advice please

My child is 4yo. Just found this sub so thought I'd ask if anyone thinks is (mild?) Pectus Excavatum? Has in this past 6 or so months been complaining a little here and there that their heart feels funny when doing any running or dancing, gets very clammy/sweaty.

My child is 4yo. Just found this sub so thought I'd ask if anyone thinks is (mild?) Pectus Excavatum? Has in this past 6 or so months been complaining a little here and there that their heart feels funny when doing any running or dancing, gets very clammy/sweaty.