Relax, everything is fine. Most lager yeasts will produce a sulfur smell during fermentation. This will go away as fermentation progresses. Likewise, slow fermentation is also normal for a lager due to the low temperature. If you got the sulfur smell, fermentation is indeed underway. You won't see a lot of action in the air lock. If you have any kind of leak around the fermenter lid (if you are using a bucket) you may be losing pressure there instead of through the air lock. It doesn't matter if it does leak, nothing is going to crawl in there.
If you pitched using only a small starter or (heaven forbd!
) no starter, you will have extremely slow activity. If this is the case, be prepared to go a couple of weeks before the gravity drops low enough to do your diacetyl rest.
Bugeater Brewing Company