Nauseous

I get this nauseous feeling as a reaction to my emotional, mental and physical status. Naturally, it's when one of them isn't quite right. Physical nauseousness happens when I get one of those irritating migraines. Mental or emotional nauseous is like right now, when things don't seem to be going right for me.
Just got an email from my boss this morning. She literally dumped a major task on my head without prior warning. It's very imporatant work and with immediate deadline and worse thing is, it's something I am clueless about. There are tons of technical details that I have to learn and understand and doesn't make it better that I've never used it before. In fact, only seen one from afar once! Feeling kind of lost and overwhelmed, so my head is whirling, not knowing where to start and how.
Not emotionally strongest right now either. Being hundreds of thousands of miles apart from someone you care very much really isn't the easiest thing to cope with. Time and distant difference is hard to bridge. People say absence makes the heart fonder, but I wonder if there is a limit to the absence. The yearning and missing can be so hard, it feels like someone is wrenching your heart. It gravitates to a physical heartache.
Crying is my form of relieve. Tears just fall uncontrollably down my cheeks. Can only wish that with each teardrop, the pain and wrenchness in the heart eases by a little.