I Just found out my Ex Girlfriend is pregnant HELP !!!!!!?

We are both 17 and we been broke up for 5months but even then we both had other partners and still have been messing around and shes single now but she texted me earlier saying she was pregnant and last time she told me she was pregnant it was a lie so i didnt believe her and she gt mad saying to come over she will show me papers and have her mom call me i tld her i would come over but it might be a couple days but then she started getting mad because i asked who the baby dad was i was jus asking because we werent together but we were messing around recenty so she gets mad saying shee promises to leave me alone and dont worry bout the child and saying dont b one of them boys to want to end up in the childs life later cus its not happein and i dont know wat to do i want to be in my childs life but now we arent talking should i just forget about the situation and move on or try to get proof HELP!!!