[short back story]. I had been with my partner 6 months when some girl told him she was 7 months pregnant with his baby. He tried to be a part of their lives but she wasn't having a bar of it because he stayed with me. A few months later I got pregnant. When I was almost due he found out via paternity test (court ordered as he took her to court for visitation rights at the least) he wasn't the biological father. That chapter is now closed and he doesn't think of it anymore.

I now have a 7 month old son, and am 3 months pregnant with our second child. I keep having dreams that she is back in our lives with an older child, about 3-4years, claiming that this child is my partners.
Why, after nearly a year of knowing the baby wasn't his, am I thinking about her? She is no part of my life, I haven't even THOUGHT of her for so long, and now I'm dreaming of her?! It doesn't make any sense!
I wake up so angry because I feel so negatively towards her for everything she put my partner through.

What does it mean? Why am I dreaming that she claims yet ANOTHER child is his? I want to forget her and move on but I feel like I'm stuck in the past thinking of all this baby drama again!

Please help