Severe breakage= Globs of hair? Few strands?
My first stretch was 12 weeks than I gradually increased it to 14 than 16 than to 24 weeks (6mths). I think if you are not yet experienced with the tribulations of stretching, it will be a challenge to combat breakage. Or maybe certain techniques you are using may not be compatible with your hair.
To answer your question, I have had breakage and SEVERE breakage, and yes certain sections do suffer...kinda. But stretching is more benefecial than it is harmful, so I suspect you should be fine with your relaxer results. I have learned what to do and what not to do over time, and I am still learning.
Tell us what your regimen is and maybe we can pinpoint the culprit.