B6 A4 Avant Won’t move

B6 A4 Avant owner. Manual transmission. Bought car on coil overs and I live in the Midwest where snow is an issue. 2 days ago car wouldn't move after stopping at a stop sign. Was able to push it out of traffic and it eventually was driving again until I got to work and had to push it into my parking spot. The car starts fine, and when I put it into any of the 6 gears, the RPMS drop and it lurches slightly but not movement whatsoever. It's too cold currently to roll around on the pavement and get under it but should I be concerned about a clutch/transmission issue or is it more than likely just snow/ice caught in the wheel wellls and causing it not to move????