Hi, Summer.
So sorry to read how difficult these early days are being.
Unfortunately it's just NOT TRUE ( shouting, cos it's important 😊🙂) that we can always rely on a hungry baby to wake a feed. Yes, it's the case with healthy, term babies who are gaining weight normally. It's not always the case with babies who are having problems - so we have to be proactive with these babies, and ensure they have every opportunity to feed frequently, from both breasts, round the clock.
This is also essential to establish a good milk supply. Again, with a healthy robust and thriving baby, the good milk supply happens because the baby is ensuring it does. But in other circumstances, you have to make sure the breasts are 'told' to make the milk.
I think it will help you to get some good one on one help from a knowledgable and understanding BF person - any of the helplines will listen and help you with good info. You will probably be asked if you can do skin to skin a lot - really as much as you can. Every time your baby looks like she might take a feed, offer it. There may be times this does not work, and your baby resists - don't push it, just try gently and keep up the skin to skin.
You can express on the side your baby is not feeding from if you have a one handed pump.
If your baby is positioning and attaching better, then that's good news as this in itself will help build up your supply.
Losing weight at this stage - 10 days old? - is something that needs to be taken seriously, and it's good you are taking action. It is important to discuss with your midwife or whoever told you to do top ups whether the volume of top up you are using is correct. Too much top up - formula or ebm - may mean your baby feeds less from the breast as she is just not hungry. But she may well need some top up at the moment to enable her to thrive, so she can feed well at the breast. It is a balance, and you need to be aware and in control.
Once your dd's weight is as it should be - and this should be checked of course - you can talk about dropping the top ups and just concentrating on normal direct BF.
I hope all goes well - key to it all is frequent, effective feeding and not letting your baby sleep without feeding for too long.