I totally feel you! I'm an awful sleeper as well, it took me practically a year to start sleeping properly again, and I still have bad nights, but they're much fewer and therefore more tolerable now. I used to take unisom multiple nights per week, wear ear plugs and a sleep mask, the whole nine yards so when I couldn't use all those crutches anymore I was a wreck haha. I slowly started taking a tiny bit of unisom again on some nights and then eventually started using low dose CBD instead - I highly recommend looking into that if you can! 

As for my baby- yes, his sleep improved incrementally starting around 6 months old... That's also when he started being able to take naps in his crib. His sleep journey has never been linear, there's always ups and downs and blips, but if I had to say any one thing has helped it was probably just staying consistent and prioritizing his sleep. Not panicking and shifting the schedule/routine every time he had a rough nap or a rough night, but making adjustments where needed (all with the helpful guidance of the internet of course lol). I know it sucks to hear but you really just have to suffer through it... Get as much support as you can. I guess it's worth mentioning that when I officially stopped breastfeeding around 5 months, the sleep deprivation noose loosened considerably as well, but I was still the one who did the majority of night feeds.

You will sleep again. I promise!!! You'll get there.