Re: Just returned to work yesterday, help!
Have you not tried double pumping? If you have the Pump In Style Advanced, that is possible. You will get more milk out if you pump longer... so you should probably aim for pumping 15 minutes total with double pumping.
You may also have the suction turned up too high. I never pumped past 25% on the suction. The horns should not be pulling skin from around your areola into the horn, and your nipples should also not be scraping on the sides. I had to use the largest size they make for a while and then decreased it when my milk evened out.
How many hours are you away from your baby during the day?
My daughter refused bottles too mama - and it was so stressful. But she did finally accept them. I was going to change my work schedule so that I could go nurse her once in the middle of the day if she wouldn't take them at all but she eventually started drinking between 5 and 8 ounces in a 10.5 hour period away from me.
You said that she drank formula in the past... perhaps you have a lipase issue. You can read about that in a sticky at the top of the pumping or the storing milk section. I had that problem and didn't realize it until Lilah was a year old. Lipase is a digestive enzyme in breast milk that becomes activated in some women's expressed milk after a certain length of time. For me it was about 2 days in the fridge and immediately upon freezing. You can scald the milk fairly easily with a bottle warmer, and that's all mentioned in that lipase thread.
Lilah 10/08 nursed 25 months
Beatrix 01/11 nursed 30 months