I think I'm done pumping.. am I horrible?

So iv been supplementing sense he was a week because he dropped almost 2 lbs the 1st week.. so iv been a pumping maniac every like 3 hours.. tons of water .. mothers milk tea... eating oatmeal .. nursing.. and bottle feeding formula.. I'd say he was probley he ting half formula bottles and half pumped milk each day with some nursing (snacking) in between .. my son was off from school for 3 days last week and it was very stressful barley got to pump and sense than I'm lucky if I can pump 1 bottle for him a day.. so far today iv only been able to pump 2 oz.. and when he nurses he just spits it up n it smells very acidic .. I'm going back t work on Monday n my plan was to pump in the am and pm and send at least 1 bottle of breast milk among formula bottles to daycare.. it's just not gonna happen.. I feel really shitty about this .. pumpkin has been super stressful from the beginning because I just can't get enuff.