Subconsciously you are feeling like there is a threat to him OR your relationship with him. As a parent our dreams sometimes focus on what we feel inside, this sounds as if you feel something is a threat. You could be feeling like you need to protect him from something YOU are going through. If the bills are building up and your relationship is suffering you might be dreaming of this attack and focusing in as your son when in reality it could be you! Your subconscious needed to see someone vulnerable and unprotected so you may have replaced it with your son. Just pray for protection and I wish you the best.