Hi z,
So sorry to hear you aren't feeling well. We had this flu bug around here in my area about a month or so ago... I know how miserable it can be. Unfortunately, it seems as if it's something that has to run its course. I didn't get it so bad, only in my ear for five days, but it knocked my mate on his butt for almost a month... but he wouldn't/couldn't quit smoking so that impeded on a quicker recovery I'm sure. If you smoke try not to, drink lots and lots of water and put fresh squeezed lemon in it if you tolerate lemon juice. manyeagles suggestion of drinking grapefruit juice is an excellent one as well. There's a lot of good advice having been suggested here. Constantly flushing your system with a vitamin C enriched drink and/or lots of clean water has at the least got to help... you don't want the by-product toxins of the virus to build up in your system.
If per chance you develope an infection, such as bronchitis or sinusitis, get yourself a phytobiotic herbal product if you have an aversion to antibiotics. You'll have to ingest them at a greater rate, even taking more than is suggested on the label, and maybe for a longer period than an antibiotic, but it's been my experience that they do work, and there isn't the nasty side affects like with antibiotics.
Have you tried calling a local Herbal shop to see what they may suggest?
Your young and otherwise healthy so hang in there, and I sure hope you feel better soon darlin' 
.
Oh yeah, when I meditate I breath in through the nose and out the mouth. Make sure you are pulling the breath deep into your abdomen. To ensure you're doing as much put your hand over your belly button, as you deep breath in your hand should rise. If it doesn't then you are breathing too shallowly.
Oh gosh, and as well, if you're doing a meditation and envoking the White Light for healing remember that the power of that light is going to go to the virus as well. I hesitated to say as much because other healers may disagree with me, but I was feeling irresponsible for not saying as much. And of course, you need to mete out what's best for yourself, but give some objective thought to what I'm suggesting. Indeed, I was once working with a cancer patient and inquired to the C's about whether or not healing energy discriminates between what we know as malevolent disease and the person, and I'm pretty sure they intimated that healing energy doesn't discriminate between one life force and the other. I know that sounds unlikely, but at the same rate it kind of makes sense.
Today's mighty oak is just yesterday's nut that held its ground.
------
Life may not be the party we hoped for, but while we're here we might as well dance.
------
If you spin around on your chair really fast, things around here will make a lot more sense.
.