Hi Abigail,
As Anastasia said I pumped long and hard without any kind of results for several months, it took me about 9-10 months to see any increase whatsoever. They're still small, normally 34A when I get up in the morning before my first noogling session, but I started out at maybe a 34AA (if that), so there has definitely been some increase, but it took 9-10 months for me to achieve. I've been noogling for a year now and have only gained that half cup size, don't ask me what I've gained in inches as I do not measure. I'm the type that if I start I'll end up being compulsive about it and I have sworn that I don't care how long it takes, I'm going to keep at it till I reach my 36D's. With my increased swelling from my hormones I'm actually starting out a 36A/small 36B right now and pump up to a full 36B/small 36C by the end of the day, that's with a lot of 1-2 hours sessions spread throughout the day. I don't noogle quite as many hours as I used to in the day because I don't use padding anymore and can't take the pressure for 4 hours+ at a time, so don't get up to 16 hours a day in like I used to. Right now I average on a good day 8-12 hours if I'm not busy, otherwise I just get in as much as I can. And as Anastasia said, water intake is very important, I've never been a water drinker but lately have been forcing myself to help with noogling, and it does. Also, I've been taking EPO and Spirulina for a little over a month now and it seems to be helping as well, waiting to see what size they are after my period comes and goes in about a week to see where I stand, as the last couple months that's when I've been able to really notice an increase in size.
All I can suggest is don't give up, as Anastasia said make sure you're using enough pressure but not too much, make sure you're drinking plenty of water and eating plenty of protein and maybe drink at least one protein shake a day. You may give EPO and/or Spirulina a try, also MSM from what I've been reading could have a real positive effect, so I'm thinking about trying to get some of it when I can afford it and add it to my EPO and Spirulina. In case you're wondering, I take 4 Spirulina (500mg each) and 2 EPO (1300mg each) in the morning with breakfast, and the same with dinner. So I take 4000mg of Spirulina and 5200mg of EPO a day, have to wait and see how much MSM to take once I get it.
Hope this helps and good luck! Also, don't worry about measuring to look for growth, as you'll feel it before you see it on the tape, that's the way it is with most, like me. You may not think you're growing any in the beginning of your growth, but they will grow and the first sign will be fullness, they will feel heavier than before as they start to grow, as they are becoming denser. Then with the added weight you will begin to see added size, it just takes time, for some more than others. There was a point in which I didn't think I was ever going to grow any, but was determined and refused to give up because nothing else I tried worked and was determined to find something, and unlike all the pills and creams other than having to buy replacement domes if they crack at least this isn't a constant burden on the bank account. Once you have the system you're done spending, other than occasional replacement parts or padding if you can't do it unpadded, either way a heck of a lot cheaper in the long run than supplements or surgery. And you can achieve increase without taking any supplements, as mine started before I started taking any, it just may take a little more time. All I can say is don't give up, keep the faith. Don't worry about doing long hours every day if that's too much for you, as my growth didn't even start during my days of long hours, it didn't start until I was having dome issues and was only getting a couple hour long sessions in every day. I'm doing more again now trying to help speed it up, but it's really not necessary to see results as long as you are doing it right (applying enough, but not too much pressure).
Sorry this was so long winded, I know the frustration you feel, but it will get better in time, if it's working for me (and mine are really stubborn) it's got to work for anyone. Just don't give up. :-*