I'm literally pumping right now while I check email on my lunch break at work. Luckily I have a door to my room/office.
My 1st baby was 5 mo old when he turned away and didn't want to nurse. I was so sad and had that urge for baby #2 (just for that split seccond) b/c I was sad he didn't need me any more. I tried more and he still nursed at night, but only then. That kept up for a while. I think it was because I was working 3 days so he had a bottle those days (of pumped milk). My mom was worried he wasn't getting any milk out of those nipples so I bought the next stage. I think that was my mistake. He got the milk faster right at the start with those bottles. Milk takes a min to come in when he nurses and he was impatient.
Now, my baby #2 loves to nurse. He takes a bottle, but I only work 2 days, and I still use the slow flow nipples.
I think it's awesome that you're still going to pump and are still trying. I hate having to pump and would much rather nurse. Pumps are great inventions though. Try the le leche league, that's good advice.
Good luck!