Does this mean that my Milk supply will end soon?

CaroV
FTM here. I'm 11 days pp. I've been exclusively pumping since day 5 and supplementing with formula. In the past days 
I've been able to get 3oz max from both breasts. Since yesterday I am only getting 1oz from both. BUT if I don't pump on time my boobs get super hard.
Does the fact that I'm only getting 1oz means that my milk supply will end very soon? Could you please let me know if you have a similar experience and did you end up having a positive/negative outcome? 
Please don't judge I have tried everything to nurse my son without any success. Please do not tell me to try to breasfeed directly because unfortunately that's not an option. Thank you!