I feel like I'm getting a low supply. 😯 since my son has been sick and going through a developmental…

I feel like I'm getting a low supply. 😯 since my son has been sick and going through a developmental leap all at once the past 2 weeks have been a little rough and now he's on this medicine that messes with his appetite. He eats but not much. (Still having enough wet/dirty diapers) anyways I just pumped and he hasn't ate from the right side for about 4 hrs now and I only got 1.5 oz. Usually I get like 3 or 4. What do I do!?:(