How do I get it back??

Why does it seem so difficult for me to feel aroused enough to masturbate? It’s been a problem for me for the past few months, where I just don’t have the desire for it enough to do it. But in my head I want to but my body doesn’t. Not even just that, if I do manage to feel ready enough to do it, my orgasms are just not powerful or that much enjoyable… I mean my stress levels have been very high lately as I am dealing with more and rarely have time to myself, but even before this stress I wouldn’t have the problem of practically unenjoyable orgasms if I only did it once every few days. What advice do you guys have for me to at least get back to somewhat more enjoyable moments? Should I invest in a better sex toy? Could that even be the problem??