Dear Mark18,
The fact that you are concerned and don't want to fall again - for whatever reason it may be - means that you ARE a Yerei Shamayim. A Yerei Shamayim is someone who is trying to avoid doing an Aveira. Full stop.
And from what I read it sounds like you're actually on a very high level, living a life where Hashem is "real" and literally part of your day-to-day. Kol Hakavod!
The way I see it, the only thing you are lacking is "Yiras Cheit" - And the way to achieve more Yiras Cheit is by learing more about this topic. (Not all in one go, rather a little bit every day.) So here are some sources that helped me:
1. Kitzur Shulchan Aruch Siman 151,
2. Gemara Niddah 13a/b,
3. Yesod Veshoresh Hoavodah Sha'ar Hamayim (10) Chapter 3,
4. The Pirush called Tuvei Chaiyim on Tana Debei Eliyahu, Eliyahu Raba, Chapter 18, S"K 38
May Hashem be with you and save you and guide you.
And remember: Only the beginning is hard.
Keep us updated how things are going.