Cin 3 diagnosis from smear

Letter came today, high, severe, scarey words. 

Have been seeing my GP with lower back pain and lower abdominal pain, gave me laxatives. Said he would push for an ultrasound, no ultrasound yet!! 

Since then, had my smear, results Cin 3 and all the scary words. 

Not sure what I am asking for really. Scared, feeling alone.