YOU ARE NOT A MOMMY FAILURE!!!!!!! You are a mommy who's dedicated to doing what's best for her baby through not-so-ideal conditions! That being said, many moms go through a rough pumping patch around 6-8 months, which happens to correspond with when a baby is introduced to solids. I had the same issue with pumping, and my son JUST weaned himself at 2 yrs 7 mo (although he still asks once or twice a week at bedtime).
Your workplace is not helping the situation by not providing you with a safe, relaxing environment for pumping. And your co-workers should be a lot more understanding - not to mention RESPECTFUL - when you have a sign on the door!!!
Fenugreek - despite what another post suggested - helps MANY nursing mothers, myself included. I had a terrible nipple infection and wasn't allowed to nurse my son when he was 2wk old, and fenugreek helped me go from pumping 12 oz the first day to pumping 30 oz the very next day!!!! I know that isn't typical, and I've known moms who haven't gotten much help, but it works as a general rule. Even though there isn't much research to support it, my personal feeling is that a lot of it has to do with how YOU FEEL about breastfeeding! If you're dedicated and have positive feelings about breastfeeding, you'll have an easier time wtih milk production. Again, this isn't true for everyone, but it definitely makes sense!
Nursing Mothers Counsel provides FREE one-on-one counseling for ALL breastfeeding mothers! You can contact me directly at ____@____.com or call our hotline at (650)327-MILK. We help with all kinds of questions, concerns, and success stories! We are peer counselors, so many of us have been EXACTLY where you are! We don't judge, we just provide information and support!