Ectopic Pregnancy Help!!!

Becky
I had an operation back in June to investigate my tubes etc as been trying for a baby for 2 1/2 years, whilst in op they found somw scarring tissue on one ovary that they removed. My tubes were all ok. 
Dr said i am in the risk zone for ectopic pregnancy 😰 
So she will be contacting my consultant at the surgery to get an early scan booked in at around 6 weeks so shes suggesting around the 5th Jan. 
She is feeling positive though as I haven't experienced any pain or constant cramping. 
Ive had some mild cramping but not for at least a week or two now so fingers crossed 🤞
Who's had eptopic pregnancy & what were your sysmptoms? 
Did you know something was wrong? 
Is there anything i should look out for? 
Please help Ive gone from confident & exctto worried & nervous 
Thank you 😰