I Think I Am The Father Of My Ex’s Child

As the title states, I think I am the father of my ex fiancés child, and am seeking advice on how to move forward with a paternity test, custody, and hopefully minimal child support.

The story goes that the day after we broke up, she sends me a picture of a positive pregnancy test, followed by a week later a “miscarriage” (we had 2 previously). A month later she posts on Facebook that her and her new man are having a baby and that she is pregnant. Fast forward to when the baby is born and it’s less than 9 months after we broke up, and to boot, the baby has red hair, blue eyes, and detached earlobes and I also have all 3. Many people tell me it looks like my kid and I truly believe it is. Any help for me to be able to be in his life would be greatly appreciated.