Low milk supply

Hello mummies, anyone experiencing low milk supply and how to increase it? 7 weeks postpartum but my milk supply for one day can only last for one feed and I’ve been giving formula milk for the rest of the feed. This has caused me tremendous stress as I really want to give breast milk for my child but with the low supply it’s impossible. So worries that my child might not revived the right nutrition with FM as compared to BM. Please help :(