Gold does not make any difference, except to your hip pocket . It also can cause constipation, and for my DS made his reflux heaps worse.

Good luck, it's very hard to getting your baby to gain weight when you're not 100% sure why they haven't been. I think you have a good plan, giving extra feeds will really help her to 'wake up' and start demanding more. Just make sure the breast is readily available when she does want it!

If you don't see some improvement this week I'd be employing the services of an LC to work out exactly what's going on.