Is it possible to get a positive 4 months I've got negaties all the other times

Maybe? How far do you think you are? If it has been months, I would make a drs appointment to make sure something else isn’t going on like a cyst.

Well i have pcos i usually have a period every three months

Get a blood test

This is how it was when I was pregnant with my son. I found out at 12 weeks

Did you have any sickness