Sparkle did you suffer badly from PMT in your younger days? Also did you have a 28 day cycle? I ask this as I used to have more like 32-36 days between periods, and the build up was hell after day 26. I think that people who had PMT severely seem to have the problems we are having with days and days of stretchy mucus and PMT in peri- maybe it is too much oestrogen as stretchy mucus is a sign of high oestrogen levels.
Also I have read too that longer cycle histories like mine lead to later meno. My friends who had short cycles in their 40s finished with peri by 50, whereas maybe folk with longer cycles have more eggs to use up? I am 55 and still going on with this, but all my cycles in life prior to peri were of 5 weeks duration- all my babies were 10 days late as well which fits in with this too as I used to ovulate on about day 19.
Still the PMT is dreadful I have had it all week. Head like cotton wool, moody, hot at night, restless and quite honestly a living nightmare! Everyday I think it must be coming and all I get is stretchy mucus!