Hugs and welcome. I am so sorry about the loss of your daughter on top of the miscarriages

It is totally normal to feel everything you are feeling, after what you have been through, which is more than any woman should have to bear. I think getting to 12 weeks will be hard like it was before, and late pregnancy (I hope and believe you will get there!) will be very hard too. You are in the right place here to get support and share your feelings with ladies who can understand them. I hope you will stay around, I have been helped so much by this and other loss boards. If nothing else, you will not feel alone.
I hope your doctor or OB knows all about your history and will be sensitive to your needs. Many women who are pregnant after loss are helped a lot by getting more scans and/or heartbeat checks than the OB would normally do. It can help put your mind at ease when you are getting scared something is wrong.
Welcome again and oh yeah,

No matter what happens tomorrow, today you are pregnant, and that is great!!!!!

I hope this will be your rainbow baby after the storm!