The pill

Ok, so my boyfriend and I have been always using condoms but it's time we want to double up and use the pill. You know, double protection. But I've Used the pill before (I don't know which one I'm sorry) and it made me very sick in the morning. To the point I couldn't move Because I felt like I was going to vomit. I ended up one day finally doing it and decided I couldn't handle the constant naucuousness I got from the pill. But I want to try again soon, any tips on how to avoid nausea?