You probably dismantled a block on the station or shoot some rockets at it. From this point on the station will be hostile towards you, only way to fix is via creative (enable creative(F1) => type in chat "/diplomacy 1 2 20000" => disable creative F1)
You can still move the ship with rcs if you only have water. (fuel=h2), dock with station (after setting diplomacy) and purchase fluids from npc with wrench, alternatively you can mine for ice. Last option is to get lots of o2 canisters, drift in suit until you find a wreck then take it's water with pouches and return (it's a tedious process but doable). If drones attack they they bring a full tank of water and h2(fuel).