What Causes Inconsistencies In Menstruation?

Hello I was feeling unwell at the beginning of the yr dizzy and lightheaded so I finally went to a Dr, something I don t usually do as I am a well person. After a million different tests it came to that I was anemic. I ended up at a specialist very early May he said I have fibroids and asked about my bleeding I said it was very very heavy for the first 3 days then totally stopped for a few then spotted for a few more and my period was very regular as in after a period it was 21 days. He advised me I would need a hysterectomy as that s the only option which is fine I am 43 this yr and have 5 beautiful healthy kids. My pro]blem is that I need wait for 12months or 10 now and I find my period is coming every 2 weeks, when I sneeze its like someone has stabbed me in the tummy and sex , well that hurts I don t know what to do :(