Not sure what to do

So my baby daddy girlfriend has been messaging me on fb and i never reply back and saying all kinds of things to me. She told my cousin i trapped her boyfriend and they want a dna test and if her boyfriend is in my sons life then she has to be too. He started going out with her in march and she just found out she is a month pregnant. I am due in 20 days and i didnt trap him at all. Me and him dont talk anymore. I feel like i am emotional damnage inside