Very interesting to see how uniquely diverse we all are
I also am Peri menopause, just before being dx i hadn't had a period for five months, once i went on meds they came back on with a vengeance..Went another 7months with constant bleeding for weeks at a time, they seem to now of settled again when my levels came good..
I have to agree with goolara and must say...recently was dx'd with hypo and had the every two weeks period on and off for the past two years. So, for me it definitely about any meds.
It could be either or a combination of both. Have you had thyroid bloodwork done since your increase? Which meds are you on and what was your dose before and after the increase? If your thyroid levels are still off, especially if your increase was a bit too much, it could very well be contributing. It's really difficult to sort out the symptoms of those two.