Any suggestions please?

Vanity

My baby is almost 2. He has issues with drinking milk and toddler formula works but it’s expensive. I breast fed ( exclusively pumping)until he was 18 months, I stopped because I had to take medication for my health issue for 2 months and now I don’t have to take it anymore. I’ve seen that I am still producing milk but not much at all not even 1oz. Does anyone have suggestions on how to build up milk supply if it’s possible?

So far all I been doing is pumping every 2 hours a day. I been doing it for 2 days now

Thanks so much