Depression affecting pumping

I knew my depression was coming back. I went to my doctor right away and got prescribed pills to stop it early from affecting me too much (was extremely suicidal before pregnant, was dormant for 3 years but now came back) and I have my one month old son who breastfed and drank bottled breastmilk only until recently. I used to only have to get one bottle of formula milk a night when I ran out of my supply for him. He's going through a huge growth spurt and my body can't keep up just yet. The other day I stupidly forgot my pumps and became so full of milk it hurt and I was stuck like that for a whole day, when I got home I pumped 10oz of milk. But within 2 days later I'm just not in the mood to pump or even breastfeed, I'm too sad to and I forget to. I'm scared my milk supply will dry up, I still have milk in there and I pump at least 3 times yesterday every 2 hours. Still getting about 2 ounces but the problem is in the mornings I would get over 4oz normally before my depression got the best of me. Does anyone have any advice to at least motivate me to pump again? Before anyone suggests think of my baby, I have tried to and I am so sad to really say this but it doesn't work, thinking of him makes me worse because I feel I can't provide for him. I'm just so tired guys.