What should i do,Bachelor Degree in Toxicology or a BS in Chemistry?

Talk to your counselor

Are there even any colleges or universities that offer a bachelor's in toxicology?  Even if there are, my professional instinct says it would be better to earn your bachelor's in a broader field and then, if you still want to work in toxicology, get a master's in that field.  An undergraduate major in such a specific area might limit your job prospects if there are no jobs available in your chosen field.  

However, I strongly recommend looking at directories of colleges and graduate schools to see who actually offers a major or a degree in what.