Hi, I started HRT a few weeks ago initially with Utrogestan 100 tablets and patches but could not stomach the Utrogestan, it made me very ill very quickly but different people react differently. Peri in general is a difficult time since one's own hormones are usually fluctuating and one can be fine one day and not great the next (using the same HRT or other meds or nothing). You may be able to try a different type of progesterone. All the best, AG