Again, many women have these types of
periods in perimenopause, only to go back to normal
periods again or even start skipping them for awhile to any combination.
The fact that you ARE on hormones already is saying to me that you MAY need an adjustment in those meds or, a change of them to perhaps, coming off of them under a doc's say-so.
Make a call to your family doc or gynecologist and see what they have to say first.