Hey Danni -big congrats on a +ve OPK!! Get locked into that bedroom!
Did you get the +ve today? If you did then you won't actually ovulate for another 24-36hrs and your temp will go up AFTER you have O'd.
The earliest most HPTs will detect HCG is 10dpo although for many women, levels are not high enough to detect for another 5-7 days later.
Not quite sure what you meant about AF still being due cd28 as the "luteal" phase should be a fairly standard 14d (maybe 10 at the earliest) which would make AF due cd 34 for you -hope that is clear?
Anyway, wishing you the very best of luck for a BFP soon.
Sorry that you are upset by the specialist appt -hope whatever was said was not too bad -you should not have to leave an appointment feeling like that!