Milk coming in after a second trimester miscarriage

Va

I had to give birth to my baby at 17 weeks who was already passed. My milk startedto come in, i have 2 kids and i always produced a lot of milk and my breasts are enormous, so sore, can't even lift my arms up, what should i do? I was thinking about expressing some milk to relieve the pain, but that would just make it worse, no? I called midwives and they said dont do anything, will go away in a day or 2