Just sleep on it like the ladies said. I texlaxed years ago on a wim and I regretted it so much (I still do). I am not trying to discourage you, I am just sharing my experience. While I enjoyed it at first, It was very hard to get the new growth processed similar to the older texlaxed hair. This created many demarcation lines in my hair shaft witch eventually led to breakage of course. I know that there are many people who texlax successfully, but not all heads of hair is the same. depending on the hair's porosity and texture it could have completely different results.
My hair broke off and it lost so much thickness. It made me so sad watching my hair shed like crazy every wash day. I lost half of my hair's thickness in a year and it was devastating for me to watch. I wanted to wear wash and gos with a looser texture. But it never looked right because the curls were not uniform and some pieces were straight and some was curly. I am transitioning from my texlax for the last two years and the different textures are driving me nuts.
Take your time and think about it because once you put the relaxer in your hair it's permanent unless you transition again. If you are thinking of wearing your hair straight, maybe play around with heat styling first before you commit to a relaxer.