Hi bev
I'm not really clear about what the main problem is? I understand you are on quite high doses of certain meds known to have side effects including nausea - so wondering what the symtpoms are that you had before starting these meds?
Although progesterone performs physiological functions in the body, in terms of balance, as I understand it, the only crucial area where we need the right balance of oestrogen and progesterone is in the regulation of the uterine lining.
During the menstrual cycle oestrogen is "dominant" during the first part of the cycle, when most women feel at their best. The oestrogen is "balanced " by the progesterone during the second half and this is normally sufficient to ensure that the uterus lining is shed at menstruation, when progesterone levels fall. Most women feel at their worst during the second half of the cycle when progesterone is "dominant".
Menopause obviously upsets this cycle of hormones and many of the symptoms are due to the rapid fluctuations in both oestrogen and progesterone, and ultimately to the decline in oestrogen as we get further into peri-menopause.
I would be wanting to phase out the meds you are on and get some blood tests of all sorts of things to get properly checked out, so that you can find out what is causing your symptoms - and if there is anything wrong. Then if it is hormonal (female or otherwise) this can be treated.
Taking progesterone will only cloud the issue - and I wouldn't recommend buying the stuff.
One suggestion would be to take oestrogen and progesterone during the second part of your cycle, if the fluctuation in hormones is causing the problem - I don't know if this is ever generally recommended or not!
Just thinking aloud so hopefully not completely off the wall!!
Hurdity x