What should you do now?

Your choice to maintain speed and continue driving is correct because when entering a town or built-up area, the standard speed limit is generally 50 km/h unless otherwise indicated. You should not increase speed, as that would be unsafe and illegal. Stopping at a bus stop without a valid reason is also not allowed and can obstruct traffic. Maintaining a steady speed helps ensure smooth traffic flow and complies with traffic regulations for driving inside built-up areas in Germany. Keep in mind that approaching bus stops requires attention, but unless a bus is signaling to pull out or passengers are boarding, there is no need to stop just because you pass a bus stop.