Permanent hair-straightening!

Hi,I was wondering, with the chemical hair straightener, if a possible scenario can work for me!I currently have very thick, wavy, shoulder-length hair, and it bothers me when i cannot even get a comb through it without losing quite a number of strands of hair per combing.If I was to get a/the chemical relaxer in my hair, and then cut my hair into a crew-cut (or whatever?), will my hair eventually be straight?I ask this because I am worried about losing some or most of my hair! I've heard that some relaxers are so strong that your hair may start to fall out!Thanks..Steven!