After I Take Norethisterone That Is Prescribe By My Gyne

after i take norethisterone that is prescribe by my gyne due to my luck of periods for almost 5 months i feel very sick, dizzy, severe headache and no energy at all as if i cant even stand up, i get chills but no fever and my skin felt so dry, i dont know why it is happening when i consulted my doctor again she just told me to stop drinking it and thats all. i stop it for 2days already but still i feel the same.