I recommend First Response or Clearblue Digital (clearblue is more expensive but it either says pregnant or not pregnant).

It depends on how far along you would be as to wether testing tonight will pick it up. If you want to test tonight maybe get a 2 pack that way if it is too early to pick up you can try again in the morning when your levels are at their highest with the second test. I know how hard it is to wait even 12 hours until morning!