Hello: I'm taking prometrium manufactured by Akorn(I've been reading that this may make a difference) for perimenopause symptoms like body aches, breast tenderness, long periods and feel pretty good taking it as I sleep better, less body aches and mood seems to be better. However, after my period until I take it again I am so tired and have headaches. My doctor says to take it after I ovulate until I have get my period so have been following that pattern. What else can I do for that time between taking it?