Regaring the placental abruption.
I had bleeding my entire pregnancy. Mostly spotting but red mostly and never ever a day without it.
At 27 weeks I had bleeding like a period, soaked a pad and had clotting, I was admitted for 4 days. That night I had a LOT of back pain and contractions that needed to be stopped with medication. They would not stop and got as close at 2 minutes apart but the large dose of medication worked. I did get a shot of the steroids and met with the nicu team because they were sure I'd be delivering that night.
Since that night I have been on bedrest ever since and not a speck of blood. They cannot actually see the abruption on the ultrasound but only 25% of them show up on u/s. They can also tell by blood work, so they will order labs for that too.
I was in a car accident at 18 weeks but its still unknown if that caused it since I had the bleeding before the accident but it didn't get really bad until 27 weeks.
Let me know if you have any more questions!!