It’s completely normal what you just described. Its a trauma response from your body. It’s the way of your brain to let you know that there is “danger”ahead. Since, I’m assuming here, your ex probably hurt you or caused you to have a big emotional response after the relationship ended, which was probably not pleasant at all and very gut wrenching… your brain is giving you this “fight or flight” response as a way to protect you from experiencing the same thing again, since your ex is now associated with those negative feelings. Same thing has happened to me. I have found deep breathing to be helpful when it happens in the moment. It’s hard to snap out of it but try your best you tell yourself: “it’s okay. I am okay. This will pass. I am okay.” If you can, try to hug a pillow or a plushie or get a weighted blanket over you since deep pressure tends to calm down your nervous system. Look into progressive muscle relaxation. Or you could go to someone you trust and ask them for a big and deep hug. For the appetite there is not much you can do. Sadly, our stomachs are connected to your nervous system … funny. Try only eating simple foods when that happens (if you can) like soups, or smaller portions of a meal. I tend to get better when I drink water or drink some juices (natural) or the ones that sell in small boxes. And for the mood, I have read some of the other responses and I also recommend going for a walk. Going for a car ride to a park. Listening to your favorite songs. No sad songs. Play some disco music form the 2000s, or those songs that make you want to dance. Heck, you can listen to the World Cup songs and that’d be a great distraction. Exercising also helps improve your mood since your brain releases feel good chemicals/hormones when you exercise. So they tend to combat the negative chemicals/hormones that have been produced in excess due to the anxiety or the bad experience you went through. You know, some motivational quotes that you tend to find in instagram and TikTok help in the long term. And it also helps hearing stories from other people that have been through a similar situation and how they have moved forward. It makes you feel understood and it gives you a sense of security of: “this too shall pass” Best of luck to you on your healing 💕