Exclusively pumping

Ive been exclusively pumping since my son was born (12/17/18) due to a poor latch. I was never good about pumping every 2 hours so sometimes I would go 4 + hours but when I would wait that long I would pump at least 3 meals worth for him (about 2.5 oz each) my supply seemed to drop out of nowhere and I’ve been trying to get it back up. I try to not exceed 3 hours between pumping so my body can be in a schedule. I drink lots of water and have also been taking fenugreek. When I pump I’m just barely getting 2 oz each. I’m worried my supply will not increase and I will not be able to keep up with my son when he starts to eat more. Does this seem normal?