Can't connect to RDS after changing size

I have an RDS instance that I was able to connect to remotely fine for months now. However, tonight I downsized the DB because we we're paying for a lot of unused CPU. After the change from m3.medium to the t2.small I can't connect to it anymore. I have terminal shortcuts setup so I can't be typoing it. I double checked the security groups and thats still applied and the host is the same and everything. I'm not sure what else to try. I just get:

ERROR 2003 (HY000): Can't connect to MySQL server on '<my-host>.us-east-1.rds.amazonaws.com' (60)