A little confusing..

So today I just went to a clinic that does pregnancy tests and confirms them. And I got a positive confirmation yay!:) but then she told me she didn't think I was 11/12 along yet an thot I was around 7. But then she told me my due date was around April 29. That jus don't make any sence to me. She couldn't figure it out right cuz my cycles are so wacky. I have a dr app on thurs with my midwife so I'll find out then but ya rit now just a little confused.