Supply is gone?

Ok so early on my supply dropped and I wasn't pumping regularly and I basically lost my supply. My little one wouldn't latch. Well he is almost 4 months and I've been trying to get my milk to come back but he's not interested in my breast. The lactation consultant said pumping every 3 hours would get it to come back but it hasn't yet.. I'm taking fenugreek and brewer's yeast and flax seed and oats. 😐 Am I wasting my time? My son literally will not latch so I'm just wondering if it's even possible to just use the pump and get my milk back. When I do pump little droplets come out but not even enough to fall into the bottle.