So glad you're feeling better. Obstructions are the worst!
Just thought I'd mention -- if you know your obstruction is low in the tract, near the rectum (for me I have a stricture at ileum/rectum hookup post-colectomy), you could do a mineral oil enema and lie on your back with your legs up and it can slowly lubricate an area. It won't solve every problem but I keep a couple of those on hand just in case.
But, lately, I just go to the ER if it doesn't pass within like 2/3 hours. Best time to go to the ER is first thing in the morning at like 5-6am because they've cleared out the folks that go in at night and most people aren't there yet at that hour.
I also call my GI's office and have them page whoever is doing rounds in the hospital and sometimes they can pre-prescribe you pain meds and anti-nausea so you can get them much sooner when you arrive, versus getting in, waiting for the doctor there, etc.
I only learned about that on my most recent visit but wow what a difference.