While I haven't exactly been trying to lucid dream and therefore don't do it regularly, I can feel emotionally burnt out from it and find myself deliberately waking myself all the time for a good few months or even half a year or more. The desire always returns after a while. Maybe you're feeling something similar, just a bit overtired from it? Then you're also worrying about it on top of that, which might in some way be exasperating the problem, kind of like a self-perpetuating thing. Maybe there are other things going on in your life to make you feel distracted?

Well, I feel I can't really give too much advice as I'm not knowledgeable on the topic but it sounds like you just need to take your time and not push yourself so hard. Maybe it's your mind's way of telling you that you need to maybe just relax and go with the flow for now.