For a newb 13-14 shaves before a touchup is not shabby at all - in fact that's great. I suspect it isn't necessarily the change in your stropping routine; there are so many variables in edge longevity, including beard prep and shaving technique. It probably just needs a simple touchup. What type of paste is on your strop? If it's something not too agressive, like chrome ox, try doing 10 light laps or so and you should be back in business.