Help I need advice

Long story story. My kids father and I broke up bc he blammed me for having a miscarriage. I fell pregnant again with TWINS and he wants nothing to do with me and started a new relationship. We planned our whole future together and I’m so hurt he moved on so fast and really loves this girl. How do I get over this. My mind is consumed with it and I can’t seem to move forward. I can’t get out of bed. My mind is racing 24/7. Please send me couraging ways to move forward or even your own story