Hi Dustmite,
Well I think I miscalculated last month but this month my period came over a week early.
It started on the 28th of last month and according to FF and my sticky mucus I think I ovulated yesterday.
But if you come up with a different quote please let me know.

Cheers..

ok, start of AF on the 28th ending around the 1st, assuming the same 28 day cycle you had listed in your initial post, and also a 14 day luteal phase:

Possible fertile week of 7 -12 with ovulation on the 11th. AF on the 25th.

now what I'm not sure of is your miss calculation. what did you miscalculate on? if you still started your cycle last month on the 5th but AF came again on the 28th then I think that is a 24 day cycle and this months dates would be different:

possible fertile week of 3rd - 8th with ovulation on the 7th. AF again on the 21st and a 2nd possible fertile week this month of 27th - July 2nd with ovulation on July 1st.

are you able to feel the release of your eggs? If so, tell me when you think you feel your egg release and also when AF visits you next. That should show me a pattern. If you tell me what you miscalculated on last month, I might be able to figure it out from that as well.