Age 42, regular cycle, period 10 days late, negative hpt 3 times, stomach & breasts bloating, mild lower back pain and pelvic cramps , no nausea.?

Not Saying I'm right: The average age of menopause is 52. That is 1 year without a period due to maturity. Leading up to that is "perimenopause"; ovulation may occur less frequently but you actually produce more estrogen and levels can change rapidly; one reason for hot flashes. You may have skipped ovulation for this reason and the additional estrogen may be linked to sx's. Bleeding may be heavier when it happens.

Late period: Assuming you are not pregnant and not on hormonal contraception- this may result from having a an ovarian cyst called a corpus luteum. This cyst occurs with each monthly cycle, however, sometimes it doesn't go away in the usual two weeks and the cycle is prolonged. This will usually resolve on its own. Get a blood pregnancy test to make sure.