Three weeks ago I went to the doctor and he told me that I was likely going to miscarry. Nothing has happened yet and I am concerned as to what is going on. Is it possible that I'm still pregnant? Is it possible that I got pregnant again?

Go back to the doctor and get confirmation...

Also ask questions,why did he think you would miscarry? etc.

He didn't hear a heartbeat and he couldn't really see a baby. He also did blood work and my levels were low.

Depending on how many weeks you are it can be hard to tell...

Look,I'm not a doctor,you were there,but you have a lot of unanswered questions..

Really I would go back,or somewhere else and get some answers.

I recommend a second opinion. That happened to my aunt. They said that they couldn't find the heart beat and that she had miscarried. They gave her some drug to basically flush her system out and she went back for a check up and the baby was still alive. They'd just missed the heartbeat the first time. She ended up having an abortion thought because the drug was known for causing severe physical and mental retardation and she decided not to go through with the pregnancy knowing that. Moral of the story, always get a second opinion just to be sure and play it safe.