Migrane prevention symptoms and conditions

hi, i seem to have a lot of the less common side effects: hair loss, itchy, acne, back ache, frequent urination, yeast infection (started with vaginal bacterial infection when i first started and now have yeast infection around arrival of cycle each month and now doing preventative measures, but not sure of effectiveness yet), irritability, restlessness, inability to focus, sore throat, change in taste, and hot flushes, though sometimes tingling and coldness in my feet.
my dosage is low, 25mg, for migrane prevention. was supposed to work up, but will not. spoken to dr. and am now taking 25mg every other night before bed. i was very drowsey at first and had seemingly adjusted, but will only take it before bed. it does help curb my migranes, and with the relpax to kick them when i do get them things are manageable.
what i would like to know is if i finally get to the lowest possible effective dosage, does anyone know if over time will the side effects become manageable or will i continue to have them or worse get more of them. to be honest hair loss, acne, and yeast infections are not a girls best friends, then add aggression and aggitation and i am not sure if i even want to be around me, yet i have less migranes. ANY replies will be greatly appreciated!!!!!!!!!!!!!!!!!!!!!!!!!!! sandy*