Low milk supply

Hi, are there any mums out there with low milk supply due to late in breastfeeding. Im currently 1.5 weeks pp and i didnt breastfeed thruout because my milk wouldnt come out. Now its out but only a few drops. Anyone with similar experience and has managed to fully breastfeed? Any tips? Im so sad and regret i didnt breastfeed immediately after giving birth. My breast was sooo engorged then but now its not anymore after massaging. Does this mean i can’t produce any more milk? Ive tried pumping every 2 hours but still so loww, sometimes none at all:(( any tips mummies?