Hi, You have really done such an amazing ob here, and I don't think your breastfeeding journey needs to end anytime soon. I think you can broker a win/win situation for yourself and your baby.
Interestingly, while the risks of using mottilium haven't been researched well beyond 12mnths, the risks associated with using infant formula have been well researched. I am not saying it's poison, just that there are risks associated with it's use, and I just point this out because so many people
assume that formula is risk free.
As your lactation progresses it should be less reliant on high levels of prolactin as the baby's sucking is the thing that regulates supply. I note that you tried weaning off motilium when your little one was 4 weeks old, but perhaps things were not suffieciently bedded down for her feeding alone to drive supply. This may not be the same later on down the track.
Around 6 mnths of age babies begin to eat solids. At first it's more for the experience than the nutrition. But, over the course of the second half of baby's first year, food gradually takes over from milk. Breastmilk supply does reduce - but that's the way it works. Your baby needs less milk so you make less milk. You might find that you can "top up" your baby with food and, depending on how you feel reduce the motilium. Your supply might be strong enough to "stand alone" in the second half of the year and your baby won't need as much milk as she will be supplemented by food. A mum in our aBA group found that in the early days she fed at the breast, expressed and topped up with EBM and formula, but after the baby started solids she was able to remove the formula from his diet so he had just breastmilk and food.