Ok im going to admit to a mistake revolving around NAT gateways and Lambdas. So, i basically wanted to connect a Lambda to a Postgres / RDS database, for that I had to put into a private VPC, but the lambdas still had to talk to the world (a lot) so i just put a nat gateway around it no biggy. Well, end of the story on one day i produced 2000 Euro in cost for the Nat gateway haha