Antenatal expressing?

My midwife asked if I want to consider it and store it in the freezer so when baby comes and worst case scenario he gets separated, he has milk, and I said yes due to the fact I’ve had x2 preemies before, I’m 35+5 and was wondering if that was too early? Even though she said it’s fine to do now I just feel funny about it? Not to mention it hurts, and it’s so hard to get colostrum out, she gave me x6 1ml syringes and a cup to collect it... I feel like a dam cow and my poor poor titties ache from all that squeezing lol, I remember why I gave up breastfeeding 😖