bleeding after smear test :(

Please can someone advise me on this… I had a test done yesterday (I am exactly half way through my cycle) The plastic brush was covered in blood and the Nurse said it is quite normal and the only thing is they may not be able to test my cells… But this morning about an hour after getting up I had (sorry to be gross) dark brown blood coming out as though I was at the back end of a period… I am terrified. I called the drs and have an emergency appointment in an hour. Does or has anyone had anything similar to this? I am not sexually active with my partner and haven’t been for over 5 years now… so I guess there is no way of having symptoms of bleeding after sex to be able to raise concerns myself. I am really panicking as I suffer with health anxiety already and panic attacks… Sorry to rabble on :’(