Awww...i'm so sorry. Don't feel so bad, u'r surrounded by so many friends here. U'r not being ridiculous at all. Sometimes we all get down and feel just nasty, but u may have something making it worse.
Of course i don't know the answer to u'r question, but wanted u to know i'm here in u'r corner and hoping u feel much better tonight. I do think i've seen others say the med does make them feel down, so maybe it's the avonex as u suspect. I use Cymbalta to help calm my symptoms, but it's an antidepressant and i've heard very good about it for both uses. I like it and imagine it's prob kept me from being down many times too. Others here are on other meds and can tell u about them. I'd do some research on them all and would ask my doc for something when u see him again. This is alot for u to accept and absorb so quickly, so who wouldn't be depressed even without the med. Hang in there and u'll make it!