Thanks for the replies, everyone.
The day I wrote the OP, doing something strange finally helped me fall asleep. That particular day, it wasn't just that I couldn't fall asleep when I laid down. I had such anxiety about being woken up, it was uncomfortable to lay there. Finally, I sat on the floor and leaned over onto my pillow on the bed, trying to simulate when I take the train and I rest sitting up, but don't actually sleep. This took the pressure off. I stayed like that for an hour until the anxiety subsided enough for me to crawl into bed and actually fall asleep. I don't think it's an ongoing solution, but it worked in this one case.
Unfortunately, the next night, I also had trouble falling asleep and then I was woken up very early by noise and couldn't get back to sleep. The funny thing is, I got ready hours early for my late shift at work and then laid down, convinced I still wouldn't fall asleep. This time, not only did I fall asleep, I slept until 10 minutes past when I would have had to get up to catch my bus and I had to take an Uber!
Mona Pereth wrote:
Have you tried masking those annoying sounds with steady pink noise?
See
Can Pink Noise Help You Sleep?I think this probably has the most potential for me, as when we had actual rain earlier this year, it did help me a bit in falling asleep.
ToughDiamond wrote:
...I can be very sensitive to noise. Even the tiny bit of noise my pillow makes in response to my breathing and heartbeat, even a slight "whistle" sound from my nose when I breathe.
This has happened to me, too.