Haven't had Aunt Flo since first week in Feb. Definitely not pregnant (have tested a couple of times to check). Am 37 years old not always regular but never gone this long. I am pretty healthy, normal weight. Still working as am a key worker and have probably been a little stressed (but no more than usual). Could I be perimenopausal? Don't think I should be bothering the doctor with this atm - but should I?