Should I throw in the towel? What would you do?

My daughter is 11 weeks old. She was born 7 weeks early and was in the nicu for a while so I was exclusively pumping for the first month or so. Now I’m still pumping but also nursing at times. I don’t produce enough to just breast feed, so I have to supplement with formula also. I’m lucky if I get 2 oz when I pump. I’ve seen a lactation consultant and after nursing for about 40 minutes she had taken almost 2 oz. I feel like I’ve tried everything to get my supply up, but nothing works (I had a low supply with my first child also). I’m thinking about stopping all together. I feel like I put in a lot of time and energy to get almost nothing. I hate it, it’s miserable. My days are consumed by it. I go back to work in a month and I really want to enjoy the last bit of time off. What would you do? I’m so torn because I know every little bit of breast milk is better than formula, but is it worth so much effort when I’m getting almost nothing?