Could Light, Short And Late Periods, Tiredness, Leg Pains Be Premenopausal Signs?

Hi I'm 43 years old. I used to have a pituitary tumor but no longer have it. My period has been regular and normal until last month when my period was really light and lasted only 2 days. My period is 4 days late so far this month. I have been feeling really tired and experiencing pain on my legs. I am definitely not pregnant. Could this merely be a sign of being primenapausal?