I only stopped having periods about 18 months ago (I'm 60). From the age of about 52, I had terrible periods which lasted weeks and weeks, and I was having to wear FIVE pads at once. It really was awful. I was referred to the hospital (I had an appointment within 2 weeks of seeing my GP), where I had scans, internals, blood tests, uterine biopsies (incredibly painful) and was talked into having a coil put in..... after 2 weeks of the coil, I insisted the doctor take it out as the cramps were awful.
I had 6 years of tests, all the same as before, plus hormone pills to stop the periods, (they didn't always work) and 6 months of iron tablets.
Any woman going through a bad time with periods has my sympathy, and you need to ask to be referred to a gynaecologist.