Hi CLKD, I've been trying to work that out, but am stuggling to reach a conclusion. My periods have been very irregular for years, and now I'm on the mirena coil I have spotting for more days than not. I've been keeping a log, but I just don't really know. My gut tells me that it probably is, but I've been really low for over a month now with very few brighter days. Just hoping that the longer I'm on HRT, things will start to settle and I'll get a better picture (3 months on Mirena, just over 2 on estradot patch). What's annoying is that on my lowest days I sometimes lose the will to record my symptoms properly, so my data isn't as good as I'd like.