Pregnancy symptoms 😳😳😳

Just how many mamas are dealing with dramatic changes in bra size?  (Boobs are bigger than belly)
I've already gained 9 lbs.  
I'm barely 12 wks and my poor AAs currently fill DDD nursing bras.  
This is my fourth and I'm looking forward to nursing again.. And as a runner this extreme difference in size is shocking.  WHAT is going on??!