I really need help

I just went through an unexpected breakup and it's been only a couple of days but I feel like it's been at least a week. I'm trying so so hard to not text him and not tell him how I feel because he honestly doesn't deserve it, but it's so hard. I am also on my period which makes it 10 times worse with all of the hormones going around. Any advice on how to deal with this? I would really appreciate it.