ok i tested on monday and was negative (nowhere even near positive and was exactly same as previous 2 days) then yesterday i got my first ever pos but no fertile cm

well today i tested and guess what.. a negative again, just like before my positive (it could have been same test it was that close!)
is this normal? do you normally just get that one positive even if you havent Od?
the pain i was in yesterday im sure i did and my temp did rise a little this morning even though i slept with window open but im still in extreme pain and cm is still creamy!

is it possible i didnt O after all or maybe i did but my surge isnt there for long before i do?
sorry but im just really confused as ive never had a positive before and never Od without some kind of fertile cm!
TIA
xx