I would recommend simply trying something completely different. Shake things up in a big way. Im not talking trying different angles, but dlip over your whole approach to photography. And see what happens.
On top of this, make sure you are getting enough sleep. The way I look at the creative work I do, is by imagining that it is actually a sport, and therefore I need to keep fit. I really do think it is true when people say 'healthy body, healthy mind' or whatever it is. I'm not saying things like 'no smoking! no drinking!', but when I am in a period of eating well, getting enough exercise and having full nights sleep, then I find my creative mind improves considerably. For along time I was getting awful nights sleep due to a back injury that had a god-awful hangover, and a fifteen year old mattress. My work has never been worse. I got a couple of new mattresses here
for the family, and not only do we all sleep better, but our hours awake are better. I can think about my work, enjoy it, and have the energy to be more creative with it. A creative mind needs plenty of zzzzzzzzzzz