yeah - they can do a blood test to check levels of progesterone, oestrogen, LH, FSH and stress hormones to see what is going on. Your hypothalamus is supposed to send messages to your pituitary (I think) gland to release the right hormones at the right time, but sometimes it can get "stalled" (this happened to me). I also conceived DD quicky (2 cycles) and am having trouble this time, for no apparent reason, but they can treat this (they put you on clomid to make you ovulate) so don't stress before you go see the doc.

Why won't you take a test? you could be pg.

Also, if you know when your mother went through menopause, you will probably go through it at a similar time. That might put you mind at ease. Goodluck!