Im a 26 year old female.My cycle is consistently 24 to 25 days. Although my dates from October to November were 53 days. HPT was negative. Following month cycle was correct. My issue is my last 2 periods, December and January. December's period was on time and normal amount of days. But my flow was just a little lighter than normal and was also a brownish to black accompanied by slight mucus discharge. I called my obgyn and she told me that it was just old blood and she wouldn't worry too much unless it was accompanied by pain or persistence. Once my cycle was over things were fine. My January period was very different. Normal days and length. But very light flow and bright reddish. My next period is due in 13 days and I'm kind of wondering what this one will bring. I haven't taking any form of because in over a year. I have felt what are considered pregnancy symptoms. But since we are currently trying to conceive I don't read too much into that in hopes to not be disappointed. My question with so many negative hpt and change in those 2 months could I possibly be pregnant but not showing positive result?

It sounds just like irregular cycles, which in and of itself makes pregnancy harder. It sounds like issues with your cycle that you may want to see doctor about.

Since you are having periods, it is not likely you are pregnant. But some women will not show positive on home tests till 3 or 4th month.

Only a blood test willl show for sure.