Pumping issue?

I'm a FTM mom and just started pumping to start a small stash so my hubby can feed the lo from time to time. The right boob has always been my better producer. I used to think my left boob was empty but when I first pumped I got about 2.5 oz from both boobs (after first morning feeding). Last night and tonight when I pumped there was about an oz only in the left one. Last night I thought there was only half and oz cause I had the lo on the left boob for a while. But Tonight I realized I got only an oz. Half way through the pumping I didn't see any milk and realized I needed to adjust my boob cause it didn't have a good suction on the nipple. So I readjust it and finally milk came out but then milk stopped coming out and I was only able to get the one oz. How can I help my supply so the left can get a lil more. Also it makes me worry when my LO does eat since he's ebf is he even getting enough from the left side??