Hi, Guys. I am really confused. I know I ovulated somewhere between between CD 16 and CD 22 (most likely CD 16 or 17). I am now on CD 30 and my temp was still up to 98.88!! It is usually only about 98.4 at its highest during the luteal phase! I normally have a 13 - 14 day luteal phase. I took a test this morning and it was a BFN. I thought I was due my period tomorrow, but my temp always drops the day before by at least .3 degrees (Farenheit). Todady it went up by .2, so I was just sure I was pg. I have been having sinus problems the past few days, mostly headaches and sinus pain in the maxillary sinuses on my cheeks. I don't think I have a sinus infection that could be altering my temps, but i don't know... Another weird thing is the lack of Post - O/ PMS symptoms this month. Usually I have post - o nipple soreness and this month, nothing! My back doesn't really hurt a whole lot like usual. My skin is breaking out a little though. I am just really confused!! If I O'd on CD16 then I am 14 dpo, but if it was the 17th day then I am only 13 dpo. I don't think I O'd much later than that!! Has anyone gotten a BFN at 13 dpo and then actually been pregnant? I don't know what else could be causing this huge temp difference from previous cycles. Any thoughts???