I have quite low milk supply .. Confirmed by lo's weight loss/very slow weight gain. I had to combi feed, it took me until 8weeks & now we are down to just one formula bottle the rest breast or expressed & lo's weight gain (fingers crossed) is going well.
I started to pump after every feed, if I'm having a day in the house I still do this. If LO has an expressed bottle or formula I pump if I'm not at a party e.g. Went to a christening on Sunday gave pumped milk. Generally LO gets an expressed bottle at 6pm as this is the only way she will go to dh or other family members on an evening.
I also found fenugreek helped bring my milk on ALOT I have to take tons of it though, I take about 12-15 capsules aday. Before fenugreek I could never hear LO gulping now I hear on every feed.
I still don't have the best supply but it's managed to keep me bf with only one expressed & one formula bottle a day for 18weeks. Considering the very bad start we had & weight loss/slow weight gain I can't believe we are still bf.