I'm 3 months delay , but my pt is always negative !
I'm ectopic last year , what should I do ?

It would be wise to see your gynecologist to see if a reason can be determined.

Some women of course do not show positive till the third month. I will assume you are testing with first urine of the morning, as soon as you wake up.

But at this point a trip to the doctor, to determine the cause would be advised.