Shakiness, regurgitation, and lethargy accompanying anxiety

I have no idea if these things are related, but lately I've had some problems with anxiety. At the same time, I've been shaky and tired, and I feel like I'm "dragging ass" everywhere I go. My handwriting has also gotten considerably worse, which I've attributed to the shakiness. I'm also always cold, and sometimes I seem to break out in cold sweats, especially my feet and hands. For whatever reason, I also started regurgitating most of my meals. This all started at around the same time; it's difficult for me because I honestly don't know how much to eat anymore. I'm not sure if I'm losing a significant amount of nutrients, but the amount I spit up seems pretty large, and I now get cravings and am hungry most of the day. I've had problems with bulimia in the past, but I overcame that a long time ago. I bring food back up pretty effortlessly now, which is why I call it regurgitating instead of vomiting. Sometimes I will think I'm about to burp and then gross, semi-digested food will come up! My trash bin is almoat filled with puke at the moment, as I've given up trying to make it to the toilet anymore (sorry, I know it's gross, but it's a waste of water flushing that much, and the trash can is usually much closer). I can't stand it and am wondering if this will end any time soon. The lethargy is bothering me almost as much; I don't know if it's related to anxiety or if it's caused by the lack of food. Is this normal for really stressed people?