Hi there, need some advice. was not suppoused to ovulate till the 11th of nov.. however on the 29th of october I got ferning on maybe baby. Is it possible to ovulate twice?

On my ttc buddies thread It is showing that i am 17dpo (counting form the 29th of oct) but now I am thinking well that cant be correct) I have taken heaps of hpt and still coming up bfn.

Any help would be greatly appreciated. bit lost on this one....