I am sorry you're dealing with this. I had 5 miscarriages so I know your uneasiness. If you can, try to read, listen to music or do anything to keep you from analyzing every ache you feel. I was on bed rest from the 7th week until I delivered my daughter. It was a long haul, scary at times and worth every second.
I know right now you're in a waiting time. Know that the 50/50 means you could equally be okay and not miscarry.
I wish I had more wisdom. You are doing everything your doctor has recommended so you're doing your best to provide for this pregnancy. Hugs to you. I know this is so difficult.
I will tell you I went to the hospital knowing I was losing our daughter. There was a blood clot in the uterus (that's how they discovered I had antiphospholipid syndrome which contributed to my 5). I was bleeding worse than a miscarriage and they kept me a week. I went home and on bedrest and very complicated medical car. I carried my daughter to almost term. She graduates next month. So things can look pretty discouraging and turn around. I pray that happens for you as well.
Feel free to pm me if you want. I will keep you in my thoughts and prayers.