don't feel bad, it took me over 8 grows to get to a successful harvest. I started at 13 years old though and only had a hiatus of a few years around 23. You'll get it figured out, just research organic growing in soilless media. Not many do it because by nature of soilless you're just flushing out all the microbial life that you work so hard to build to begin with. But don't quote me on that, I prefer much finer control over my plants and have only ever worked with salt nutes in soilless media.
Translating the research to practical use takes years though. Interacting with the plants, learning what their "personalities" are and such really takes lots of experience. Each grow is a new opportunity to learn more and come to understand more, so don't get discouraged. Some day you'll look back at your current battles as the easy days :) it's good you're conscious of pH though, that's one of the biggest hurdles for beginners to grasp. Yet, it's of pivotal importance depending on choice of nutrient line. I believe I've read some Seamaiden (may have been another big organic grower here) posts talking about wild pH swings in her organic soil grows and as such simply quit messing with it. If the plants are healthy, no need to worry.
