I have, it's a big help. I've recently really been able to "center myself" and that helps remind me that I have power over the way I feel.
Constant battle but I'm still here, still fighting.
Not sure if it's maybe a different form of meditation, but the mindfulness I do is all around not being able to control how you feel or what you think, and just focusing on your breath and letting everything else happen. It sounds easy but it's actually impossible to solely focus on your breath, you soon realise your brain is constantly whirring and going off on all sorts of tangents independent of what you want it to do.
The more you practice, the more you can recognise and sperate these thoughts and feelings from "you", and recognise it's just something happening regardless of intention. That was one of the most powerful realisations of it for me. I think our brains get used to following a certain pattern, and it's kind of like over time, grooves are formed in our minds, which our thoughts then flow through. In a "healthy" mind, this is fine, as the patterns won't be distressing on the whole. If we've experienced trauma in childhood, or anything like that, then these grooves can be quite deeply ingrained and self defeating/upsetting. The meditation really helped me to take a step back and appreciate this in action.
The analogy that was used when I was learning about it was that we have a sort of unchanging consciousness, which is what we are trying to reach and focus on when we are practicing. This consciousness is akin to a clear blue sky, our thought, feelings and emotions are like the weather - we don't have any control over them, but no matter how bad the weather is, above the clouds, the blue sky is still there. No matter how bad the weather gets, eventually it will pass and the blue sky will reveal itself again.
Anyway, I hope that made some sort of sense. Really hope you feel better soon mate.