Slight bleeding 57 year old. Scan showed thickened womb lining. Sample taken, results letter said I have to go back to hospital to see the doctor. So worried

Hi 

I had slight bleeding went to doctors got a quick appointment at hospital and had scan one day then appointment next day where they said I had thickened lining they took sample for testing  waited three weeks to get a letter saying to go back and see doctor in hospital  soon, I am extremely worried as normally you get letter in post saying everything is fine so I am now thinking the worse  case scenario I do have history of fibroids but because of my age etc really scared this time appointments should be a lot quicker to reassure patients etc a total of 4=5 weeks not acceptable really it messes with your mind not sleeping well etc