Due dates

Deserae
I am so confused and can't wait to know the exact due date! Going by lmp (Oct 21) I am 7 weeks and 2 days I think. But I tested ovulation on Nov 5th and got a positive! That's when I believe I concieved. If so that makes me only 4 weeks and 6 days. I've had no symptoms so far! 
I'd much rather me be 7w2d lol. 
Has this happened to anyone else?? Please share!!