I don't have the solution, but I have had the exact same issue.
Started on 50mg patches and sequential utrogestan- initially felt much better, wore off, upped to 75mg - same thing. Went up to 100mg - same thing.
I was having bad migraines so moved to continuous utrogestan and actually have felt much better since then, especially the migraines, but still have symptoms clustered around ovulation and periods.
My GP suggested adding a pump of gel - which for some reason made me feel atrocious for 4 weeks, but then improved my sleep. Same cluster of symptoms around ovulation and period though.
I have never found utrogestan affected my period timings, not on sequential or continuous. I'm on 200mg a day and get a very regular period, just much lighter. I think the problem is sensitivity to large fluctuations of my own hormones which HRT isn't able to buffer, there's obviously still a very strong cycle going on.
I am better on HRT than off it because my background level is more grounded, but as the fluctuations get more erratic, I have less time spent in that more stable period.
I have vaguely thought about GNRH analogues to suppress my cycle, or adding Dygesterone (sp?) on top to try and do the same. I'm quite afraid of antagonising the migraines though <<shudder>>.
Ideally I would just like to reach menopause already, but suspect it's a while off.