Yep, like Mike said, the fizz is likely CO2.
Not sure what you mean exactly when you say it smells like rubber.
If it is a "burnt" rubber smell, it is typically associated with mercaptans. Don't panic though; that probably is not the case, since that is unusual.
Did the wine smell like rotten eggs before you bottled it or did it smell right? Rethinking the current smell, does it still smell like rotten eggs?
Is this a kit? If yes, contact the LHBS form whom you bought it and discuss it with them. Or find an experienced wine maker and let him/her smell of it.
Worse case there are some labs you can send a sample to and they can tell you if it is mercaptans, though it likely is not.