Back to back twins!

So...I was blessed with two perfect baby girls 4/30/17! Two weeks ago found out I am pregnant again. Crazy to think that my girls took 5 years, a traumatic miscarriage, and clomid to get and then here we are expecting again. Went last Tuesday for initial ob visit (7w1d) and found out we are having twins again. To say we were shocked is an understatement. Shocked but oh so excited!! Trying to grasp what life will be like with 4 kids under a year old! Any of you mamas out there with back to back twins? Any recommendations on how you make life work?