Help! My bunny has snuffles ;_;?

hi, 2 weeks or so ago I bought a 3 month old bunny I named Twix. I noticed he would be sneezing now and then but never thought much of it as he seemed fine and I read that at such a young age it could be nerves. However over the past week it got worse and the last couple of day he has got a crusty nose snottiness and can hardly breathe. He is exausted and doesn't know what to do with himself. He has had a bit of water but he won't eat. His head keeps dropping and hes resting it on everything - he's weak. I have wiped over his nose and removed some crust but I cant get at the snot. I feel powerless. Is there anything else I can do for him until I get him to the vet tomorrow afternoon? ;_;