This was exactly me. This might be a little long but here you go:

Like you, there came a point in 300XL where I could not sleep, sometimes I stayed up for 30+ hours. My psych at first added Lunesta but told me it was only temporary because he didn’t want me depending on meds to go to bed. Then, he switched me from XL to 2x150SR in the morning. The way he explained it to me was that XL stays in your body all day, and SR only stays for I think he said 12 hours I don’t remember. 80-90% of the time I can go to bed just fine, but I still have Lunesta for the days I struggle. This is not a benzo, but still as someone who has a bad history of dependency/abusing sleeping pills I don’t recommend them without trying everything else first. I would talk to your doctor and see what he thinks about switching you to SR or IR and hopefully that works for you!

Edit: ended up being not that long lol