How to cope with anxiety after breakup?

I got dumped with excuses not even two weeks ago. There were issues but it came pretty expectedly and I haven't heard from him but know he's trying to look from someone else. He's clearly fine but I'm not. I always experienced some anxiety but learned to cope but I'm so angry, disgusted, sad and heartbroken that it's been so bad lately. My heart is constantly racing and sometimes I feel like I can't breathe. I have to force myself to eat and end up feeling sick after. If I think of him or get nervous about what is happening I have to rush to the bathroom to go puke. I think that's why I'm losing weight too. Once the relationship started getting more stressful I dropped five pounds or so and since the breakup I dropped 5 more and I'm already slim. It's hard to sleep and I wake up at 6 am every morning with a racing heart and can't fall back asleep. It's incredibly hard to concentrate. I feel like I cry all the time from feeling so hurt. I'm 22 but this was my first real relationship of a little over a year and the physical sickness is so hard to deal with. I considered seeing a psychologist but I'm leaving the country soon for vacation so that won't be able to happen. Does it get better and how?