Missed the 4 month shots

My son turns 5 montha old tomorrow so it's safe to say that we missed this check up.

I recently moved and had to switch doctors. After a month of waiting to see if my doctor will accept my son as a patient he finally did and I set a time for his 4 month check. Then I decided to call my insurance company to let them know I switched doctor only to find out that my plan had been CANCELED 2 days before.

NOW I've been waiting approval for a new insurance company for over 2 weeks!

Will missing these shots effect my son later in life or will he just get his shots the next time he goes in? And what will happen with his 6 and 9 month shots?