Hi there and welcome aboard. I'm Arrianah (21), mom to 17 month old twins Sonja and Jakob. DH and I are ttc#3 after a m/c last October, and we're hoping we get lucky on our first cycle seeing as we'd be testing right around (if not on) our 2 year anniversary. I have to say, I commend your courage to want to ttc all 4 kids in a close time frame. I always knew I wanted at least our first two to be close in age, but then we got the twins, lol. We think #3 now would be a perfect addition and then a few years down the road try again for 2 more (maybe).
Again, welcome to the board and sending you all the

I can spare.