Why do I feel this way?

So I was in an extremely toxic marriage for the past 8 years. I found out I was pregnant with my third child and then when I was six weeks I found out about multiple affairs and the abuse and extreme mental abuse escalated. My daughter is now 1 and I am out pf the marriage and I love my kids very much but I feel like she isn't real, and that the pregnancy wasn't real. It is really strange to explain and I don't really know exactly how. Lile I know she is real and I know the pregnancy was real but it feels fake or not true. Can anyone give any insight?