Never been so sick from fumes

I noticed a horrible smell on the mattress as soon as we slept on it. I washed the mattress pad and sheets so I know it was coming from the mattress. Sore throat started for two nights and I came down with the worst sinus infection I could ever have. Bottom line is the mattress smells horrible like toxic chemicals would smell and it is going back. Why can't they make mattresses like they used to?