Joseph,
I am currently on a routine that includes both jelqing and stretching. My main goal is to increase my length. Like you, I am experiencing a slight gain in girth, but not in length. I also notice firmer and more regular erections. About a year ago, I used a penimaster and also jelqed. With the penimaster, I was able to apply more stress for longer periods of time on my dick. Then I noticed a 0.5 inch increase in length over a 3 month period and also a 0.25 inch increase in girth. At the moment I am just doing some manual stretching. So, I think if you stretch harder and for longer periods of time you will start to see an increase in your length.
Gq4real