When are symptoms likely to start from again?

[toffee01]

Sorry to be very thick, but I really can't remember from my last 2 pregnancies.
I think that symptoms start from after your AF is due? Is that right?
I am feeling awfully nauseous like I'm gonna puke any minute, but AF is not due for a while, and I don't think DH and I did it when I was ovulating (I ovulate at different times each month).
It's more likely to be a bug I think (although I rarely get tummy bugs, in fact, I never get them [she says, touching wood]).

Sorry but I had terrible nausea, backache and cramping from 8 days past ovulation.

It's ok, I think I feel a bit better now I've eaten some toast.
I think it's most likely a tummy thing, but my GOODNESS what nausea! I've never felt like this since my second pregnancy (I'm pretty sure I started feeling sick very early but only after AF was due).
This time it's mathematically impossible, I usually know when I'm ovulating, and I'm sure I haven't yet.
My cycles usually go something like this: CD28/CD31/CD28/CD31 etc... it seems to alternate for some reasons. No idea why.
My last cycle was 27 days, so this one coming should be 31 ish, which means on day 12 (today) I shouldn't have ovulated yet.
I would love to be pregnant don't get me wrong, but it can't happen if I haven't ovulated.
It's probably because I needed to eat something.