EXPERTS!!! Been late one week: before Af was suppose to arrive cramping and normal af symptoms,?

back ache, then everything kind of disappear except for bb's heavy and feel bloated, af cramps gone; until this morning (10 days late), I was sure AF was going to show up, nothing. Very, very sleepy, no CM at all (except 2 days ago, very hot). No energy, but thought maybe starting menopause since I'm almost 40. BB's large and heavy. What do you think????