I know I'm grasping at straws but...

Mrs.R • Married on 10.24.15. TTC since 01/16
I'm 13dpo according to glow and 14dpo according to FF. I was almost TOO confident that this was our month!! Took a test @7dpo-glow @8dpo-FF (I knew it was waaaaay too early) and then again yesterday @12dpo-glow @13dpo-FF and both were negative no question. My temp started to drop yesterday and then really dropped again this morning and yes I always always temp first thing in the morning at the same time. 97.6 is what my temp is at today and last month when my temp dropped at 13dpo also to 97.6 AF came that day following a little bit of brown spotting. There is still no sign of AF at all today (no cramping and no spotting) I am just concerned with the temp dip...anyone have any feedback or success stories???