The pain of divorce is great and your subconscious will opt you out of it one way or another if you do not take active positive steps to cope with what you are going through. If you do not make a conscious decision to do things to cope with the pain, your subconscious will do it for you in ways that are not always beneficial.
Divorce is a great equalizer.
All have some pain and physical reactions to the loss of a relationship, no matter how bad the relationship was and no matter what a relief it is to be out of it, no matter how competent you are and how well you cope normally. However, if you take extra precautions, treat yourself well, and learn methods of coping with stress effectively, it need not do you any long range bodily or emotional damage. You can wind up stronger because of it. Avoid overeating, however. Take a fun trip, spend some money on yourself.