Take care of yourself. I know it's tough to leave a 24/7 relationship. Do you have support lined up?
I hope you remember if you do get involved in another serious D/s relationship, that it doesn't have to be that way. Healthy D/s needs to take into consideration the wants and needs of BOTH parties involved, even if that's done in such a way as to be decided by the D type. I always say that my partners take care of me on my terms, and I take care of them also on my terms. But if I wasn't caring for them in the way they needed, if we hadn't negotiated what will make them happy in a relationship, then it wouldn't work.
You will be okay. One day at a time.