My cycle is always unpredictable, however ranges from 29 - 33 days. This month I believe I ovulated on the 13th or 14th (just because I felt a bit of ovulation pain on both days so not sure which). I have been having pregnancy symptoms this month, but I might be imagining them because I'm panicking a bit. I just POAS and it was negative. Is it ok to assume I'm not pregnant? My period is not due until 27/28th (based on supposed ovulation date), but would have thought that it would show up on a hpt by now?