Periods (again!!!!)

girls, I have been on tamoxifen since April last year. Periods stopped half way through chemo. came back after a year. I have had three cycles so far - normal cycle is 28 x days. my first was 65 days, second 55 days, third 34 x days so things were starting to return to near normal. I had the stop tamoxifen for a week when I had my recon (10 x wks ago). Had a period before the op but nothing since. think it is about 80 ish days now. not sure whether they will return at all now. that break of the tablets seems to have messed everything up again. anyone had similar ?

Vez xx