Can't stop obsessing

So, my ex and I broke up at the end of January through text. I confronted him about saying he doesn’t want to have kids with me because he doesn’t want multiple baby mothers. I was hurt, so I texted him to express my feelings, which led to him saying he no longer wanted any interaction with me. I don’t know why, but I’ve been going completely insane. I’ve always been anxiously attached to him, and I want to let go—I have to let go. But I keep getting sudden urges to text him, and I can’t stop thinking about him. I even get headaches from it. It got so bad that I sent him an intimate photo and started texting him about how much I missed being close to him. The thing is, I crave genuine intimacy with someone, which is making me feel completely out of control. It’s crazy because I have moments of peace and clarity, but then I go right back to reaching out to my ex, acting irrationally. I just don’t know what to do. I know it’s desperate, but I can’t seem to talk to anyone about it because I’m embarrassed. I don’t like my behavior and really want to stop. I’ve never felt so crazy and sad at the same time. I wonder if anyone else is having a similar experience—being 22 and craving real intimacy while feeling completely lost when being ghosted.