Mommies w/ Identical twins..

I went for my check up today with my specialist, I am 17w4d.. I left kind of worried.. My babies share a placenta & baby A is measuring 17w4d but B is measuring 16w. I'm so worried about twin to twin transfusion.. My specialist up'd my protein & water intake & Monday I go back in to be checked. The doctor says if he sees growth by then it's good but if not I'll have to be sent to the hospital for a laser surgery  to seperate the blood vessels in the placenta.. I'm assuming after reading to try to stop tts.. Gosh I'm so down & feel I have done something wrong.. My babies both had full stomaches & bladders though so that was good.. But I already had a loss in April.. Lost my boy/girl twins from preterm @ 22 weeks.. Have any mommies been through this w/ identicals...?? Anyone have any stories to share w/ positive outcomes.. /: