Pre term labor and start of placental abruption 14 weeks

This is my second pregnancy. I have bled (mostly spotted) since I found out. (I bled very heavy with my first and ended up on bedrest for the first trimester due to 4 subchoronic hematomas). With this pregnancy, I have had one small subchoronic hematoma that seemed to be gone at my 12 weeks scan. 4 days after my 12 week scan, I had a huge bleed filling the toilet and 2 pads all before I got to the hospital. They used the Doppler and we heard the babies heartbeat. A midwife checked my cervix and said it was thick, long and closed. They called my doctor and the doctor said she wanted to see me in 2 days. I continued spotting (which is my normal). My doctor checked the heart rate with the Doppler and my cervix also. I asked to go back to high risk (like I was with my son) because I felt like something wasn't right. I had not had another ultrasound at this point either. After some convincing, she agreed to send me back to high risk. I had my appointment yesterday (13 weeks 6 days) and baby looked good measuring 14 weeks 1 day. I noticed a bug hill looking bump in the sac with her (they think it's a girl) and asked what it was. The tech said "yeah, that's a contraction but it's ok sometimes we see that and it will go down in a second." The contraction never stopped. I spoke to my high risk doctor after the scan (who was my previous high risk doctor - I absolutely love him) who told me that I was in pre term labor and also had the start of placental abruption. He assumed that's what my huge bleed was. The good news is, that it had gone back to spotting but I will still most likely deliver early. He didn't tell me how early and I'll be monitored each week. I am drinking tons of water and he instructed me to take one baby aspirin a day to thin the blood and fish oils (to help heal the damage). I said "this isn't good" and he said "no it's not but it's not over" and he gave me a hug. I have been taking it easy. My husband has stepped up in a huge way helping with our toddler (as he always does) and cleaning, grocery shopping and laundry. I have so many more questions but was by myself and in shock at what I was hearing. I am a nervous wreck now and so scared to lose my girl. Does anyone have experience with this? I know this is probably a case by case basis but what should I realistically expect?