Hi LEJ79, I am also fairly new to the boards! I can sympathize with your frustration! I don't normally have regular cycles(and have thought I was preggo like a million times), but I can tell you that when I went to my ultrasound after not having my period for 2 mos that they told me I had follicles growing and that is what told them I hadn't yet ovulated and where I was in my cycle. I think that is how they know you haven't Oed. The 2 day period you speak of may have just been spotting. I get that sometimes, where its not like your other periods, its just too short (for me) so I usually count that as spotting. Your cycles can be thrown off for many reasons including illness, stress, horomone imbalance(me), or any other number of things. I have read that if you are ttc and are kinda stressing over it, waiting for your period (and what all else we do when ttc!)that it can thow you off as well. Also about the having a period and not Oing...My drs told me that when you dont O your body can be lacking in estrogen or progesterone(sp) and then eventually your lining will become unstable and you will get your period- not nescessarily on a regular basis just when it finally becomes unstable...I have no idea what exactly this means but that is how one dr describled it to me- Like a brick wall with out mortar once it gets high enough with out the glue it will become unstable and fall down. hope this helps a little! :)