taking albendazole without prescription

Hi I have been suffering with parasites for some years now. I have gone to numerous doctors, only to be told it does not exist, and got put on everythign from antacids to anti-depressants. I am desperate, as i know it is also gone into the brain area. What to do?? As i have tried herbals, and they helped some, but did not cure or anything..i have ordered albendazole online, but since it has affected my brain..is it safe to take wihtout the supervision of a doctor?? All my tests have tested negative(stool test) but i know i do have this..please help..! Any suggestions? Thank you..!