Warfarin Sodium and adverse reactions

i have been on warfarin since April 2008 when i had a clot in my left leg. since, i haven`t really had much going on until last week. i was rushed to the hospital by ambulance. i got dizzy and had a very cold wave rush up my body twice. when it was over, i couldn`t hear anything and my temples were tingling and my heart rate was elevated along with my bp. the er drs didn`t seem concerned with any thing that had to do with the dvt or the warfarin. their response???????? you drink too much coffee. WELL. i haven`t had a cup of coffee for almost a week, and have also quit smoking. i am still dizzy. my head feels heavy. i get little cool rushes that almost take my breath away, i don`t feel like ME. i feel like someone has taken over the me i knew. my family doctor has done liver, mono, hepatitis, b12, folic acid profiles, all negative. had a ct scan yesterday, normal. having an echocardiogram next week and having a holter monitor put on for 24 hrs to monitor my heart. i have done nothing but sleep since this episode. my husband is scared to death i`m gonna die during the night, he wakes up just to check on me. i haven`t been sleeping very well, as i`m afraid i`m not gonna wake up. i am only 40. i am not ready to let my life go to pot because of a drug that all the doctors insist is "safe". well i don`t know. call me stupid, but if its so safe, why do they kill rats with it????????????