New Contacts–what Does It Mean If I See Shadows/clouds Around Signs And Lights At Night?

I have new contact lenses which seemed perfect in the eye doctor’s office (had no trouble reading the eye chart), but I’m having issues seeing with them out in the real world, especially at night. When I drive, street lights have a hazy cloud around them, and street signs (especially the reflective ones) seem to have shadows (almost like seeing double). And I notice the words on the sign are harder to read as well.
It’s a brand new pair, and a new prescription. Is the prescription power too strong/weak, is my astigmatism over/under corrected? I don’t understand why they seemed fine in the office though.
Thanks for any help!