When to use my expressed milk with newborn?

[Bixy15]

I am a first time mum, 5 days pp and just got home yesterday. I have a bottle of expressed milk in the fridge that I expressed as I was having difficulty with establishing breastfeeding in hospital but this is going better now and DS is feeding regularly every 2-3 hours for 15-20 mins at a time. I feel I am able to keep up with his feeding schedule by exclusively breast feeding now, but I have about 60ml of breastmilk in the fridge that I don’t want to go to waste.
1 - How can I fit in feeding him this without ending up sore/engorged by missing a breastfeed or affecting my supply? I don’t want to express again or I’ll just constantly have breastmilk I don’t need in the fridge!
2 - Can I give 60ml in one go or is 30ml twice better for a 5 day old baby?

Freeze it - keep it for a weeks down the line
to really establish feeding in these very early days get the baby to the breast as much as possible night and day

You can freeze it and use it in an emergency. You could also use it in his bath if you want, it is great for skin. You are right that if you give it then your breasts will miss out on stimulation and you may end up very full and uncomfortable which can then impact on your supply.

Congratulations on working so hard to establish breastfeeding.

Take a nap or bath or shower or pop to the shops for your favourite chocolate and get your partner to use it then whatever it is you need to feel a bit more human.
I would split into 2 x30ml.

With my second in the first month I expressed ~30ml every other day so that I could do bedtime with my eldest. Dad would offer the bottle if baby wanted it. He didn't take enough for a full feed but it bought me a little bit of time and as soon as I had finished bedtime he would have a proper feed from me. We treated the expressed milk as an emergency mars bar when dinner isn't quite ready yet

Too late to freeze. Breastmilk lasts 2, max 3 days in the fridge. Next time you express, freeze it straight away. Use it down the line at a time when you want to go out and DH gives a bottle.

Don't be ridiculous, it last a week in the fridge.

OP I would freeze the milk and use it in the bath if he has skin issues down the line. You can even use it when You start weaning by mixing it into food or porridge etc

I would break it into smaller top up feeds and syringe in at random. I expressed colostrum before birth and basically fed about 2ml of colostrum after every feed for the first couple of days. They can’t eat too much in the first few days from a re-gaining birth weight perspective. You can get small syringes from the pharmacy.