I have never had an anxiety attack until about 5 months ago. It was when the economy got bad and I had no phone calls and no work. There were many things that I had no control over and I had so much anxiety and fear that I felt like I was going to have a heart attack. My doctor prescribed me xanax, and it calmed me down. They are habit forming and don't work as well after awhile. But considering the alternative, it is worth it to me. If your anxiety is so bad tat you can't function, it will drastically affect your like in a negative way. I'm not saying to go get some xanax, I'm just saying go to your doctor and ask about it.
Either way, it will pass, and either way the anxiety will never fully go away. We all hit that rough patch, some more than others. I am a very motivated person, and have never had an issue with medical problems in the past. Try to keep busy. And like someone else said. Stay on a normal schedule with sleep.