I'm concerned. What symptoms go with congenital abnormalities?

It Depends. Congenital abnormality is a very broad and non-specific term. Symptoms will depend on which organs (body parts) are affected. Typically functions of those organs may be affected, sometimes though you may have congenital abnormalities which will be without any symptoms.
Depends. This depends on the genes that are affected. Some genes regulate heart formation, others regulate metabolism or liver function. There are many congenital abnormalities, so it depends what the chromosomal defect is.