Breast surgery/feeding off one side only

I am so tired and really disappointed with BF!
As a teenager I had a car accident and was left with a damaged breast and ended up having double implants to try to match them up - so one has almost no breast tissue and they both have implants. My normal breast is producing milk and I feed and express, but since my DD was 3 days old we have been giving her topups as I didn't have enough milk.
So I BF for as long as I can, then feed her expressed milk, then top up with formula. She is only 3 wks old and is taking 50-100ml of expressed and formula after feeding, which seems heaps. The latch is not great now because she knows the bottle has faster flow and will fall asleep on the boob so I take her off and 5min later is screaming, or she gets really angry at the boob and I figure my milk must be really slow and give up.
Can anyone offer any advice, I have seen a lactation person when she was 3-5 days old but didn't get that much from it.
Do I keep latching a trying when she gets angry or falls asleep?
How long should I let her feed for?
Do any other ladies one side feed with success?
How long should there be between feeds to know she is getting enough?

I have tried the feeding tube but find it very hard to latch with it, does anyone have any tips? The tube sticks up in the air when I hold my nipple for her and her mouth is not wide enough to take tube and nipple

I am off to see the same lactation lady on tues but just feeling so down about it all and know sometimes other mothers have such good advice and tips that might help! Sorry about the essay!
And thanks for any help in advance

Sorry I don't have any personal experience, I just wanted to add two things:
- have a look at ibreastfed.com, I'm pretty sure I saw a story about feeding off one side only (think it was called "my bung boob" or something like that) and I know there's at least one story about the tube thingy too.
- if she's getting angry at the boob to start off with then it's possible she's getting frustrated waiting for letdown, and because you're tensing up or stressed out you're inhibiting your letdown. There are some great suggestions for slow letdown on kellymom - it's partly a conditioned reflex and there are some things you can try to get it happening faster (various relaxation/visualisation techniques worked for us when we had some issues). Otherwise if she's getting frustrated when your letdown slows, maybe you could look into ways of increasing your supply.

I'm no expert but seems babies can be quite lazy and prefer the bottle because they don't have to work for it - so I'd say you should only supplement when you absolutely have to or she'll get the idea that if she just holds out a little she'll get the bottle. (Also the more you supplement the less your boob will produce - there will be a delay but you have to give your boob some time to adjust its supply. They're quite clever things when they're given a chance!)

In terms of how long and often she should feed, my personal opinion is at 3 weeks old it should be as long and as often as she wants. Look out for her hunger signs (like sticking her tongue out at you or crying with a "na" or "nya" sound) and follow her lead

Good luck!

I think its possible - good example re twins mums. my bubs have both only feed on one boob per feed too - I know its not quite the same .... but the boobs will make as much as they are normally having sucked out. So if I was you I'd keep expressing in between feeds to get your supply up. And keep bub on as long as possible, if shes getting stressed you could try expressing for a few seconds before putting her on so she doesn't have to wait for the milk.
And blessed thistle capsules and complan are both good for increasing supply.

Good luck!