What Causes Dizziness And Tiredness After Taking Kilogest?

Hi I am 42 years old. Healthy weight. Just started Kilogest after having my ovaries removed. I am 2 weeks into taking them. HOwever, I have been very dizzy, feeling faint, tired, for two days. IS it my blood pressure? could it be a side affect of the medication? I have felt fine on it, this only started yesterday. I even feel dizzy when trying to sleep. Appreciate any help THank you