Is there still hope?

I know this is barely anything.. but to me it feels like there may be still hope. I had my son 4 weeks early due to complications and preeclampsia. He breasted for a week in a half but was jaundice so they wanted me to give him a little formula to help it go away. 2 weeks after my c section I was in the hospital because of very bad back pain and the medicine they gave me they said to pump and dump for a day. Well I did but by the time I got released from the hospital my LO wouldn’t latch back on really well since my family was feeding him formula. It’s now been 6 weeks and my lactation consultant said that I can still try to pump and build up my supply. This last Thursday 1/31/19 was when I started pumping again. I’ve been drinking body armor drinks and bought these pills from Walgreens that is supposed to up your flow. When I started this journey on Thursday I was getting nothing. If I squeeze my boobs milk squirts out but when I was pumping nothing. But today, 4 days later I am able to get some to come out from the pump. Do you mamas think there is any hope for me?😞 this is my first baby. And I feel so terrible that I wasn’t able to experience this with him since after I went to the hospital for back pain I just felt miserable and exhausted whenever I should’ve kept up with it.