I have just started taking paroxetine 20ga ,half tablet so 10 mg for last 3 days,for last 2months I have suffered mentally before having hot flush due to premenopausal ,,the thoughts I have give me high worry and I suffer anxiety thru worrys,what ever I am thinking befor the hot flush is heightened ,usually I feel doom ..how long before meds work as the anixety I have in stomach since taking is worse than before