Stressed and late

Hey all. I normally have a irregular period but comes only a couple days after it originally should. I am now 6 days late... I don’t believe that I am pregnant but I know I will need to take a pregnancy test soon. Last night I was having some cramping and back pain but still nothing. This past week has been incredibly stressful and I know that stress is a factor that will help push your period back... But I’m freaking out my boyfriends ex is claiming to be pregnant and that it is his child (which we all doubt) and his family is no help in the situation. He doesn’t want a child right now and he especially does not want one with her because she is psycho and that child would be in the wrong hands.

She won’t get a blood test done to say that she is pregnant but he and I don’t know what to do from here... He is slowly blocking me out of his life and we have been at each other’s throats lately because we’ve been just reading into each other. It’s hard right now. I just need a silver lining and when I look at him I see it because I know that he is mine and I am his. He’s been numb ever since she told him that she was pregnant... I want my boyfriend back and I want her out of his life because she is poison. But I don’t know what to do... I’m here to love and support him as much as I can but there is only so much that I can do.