Mental health problems such as depression and anxiety have been linked to infidelity. A person can also experience relationship anxiety, which often causes a person to feel more insecure about themselves. It can also cause doubts for the partner and an excessive concern that one will be cheated on again. You're experiencing a real loss and you need time to grieve, just as anyone who has lost something so important to them needs to grieve.
The good news is that this level of anxiety is justified, as you are in an unstable situation, which is what causes anxiety. But if it continues long after you've sat down again, then you probably need to check it out. In the meantime, why don't you consider researching some techniques to help you live with anxiety and how to calm yourself down to reduce the impact and make you feel in control? Long after someone has cheated on you, you're more likely to experience anxiety and depression, among other mental health problems. The emotional, psychological, and mental trauma of being deceived can extend to a person's life long after the infidelity has occurred and can manifest itself in clinical illnesses.
As with post-traumatic stress disorder (PTSD), cheating can cause symptoms that last in your life. Memories, nightmares, and obsessive thoughts about the situation are some of the most common symptoms. While there's no foolproof way to determine if or when someone will cheat on their partner, there are several common consequences of being the person being cheated on. You may have cheated on your partner and you may be surprised by the consequences of that decision, or you may have been cheated on and have difficulty overcoming it.
There's no particular order in which you might experience some of the psychological effects of a cheating spouse and you might not experience them all, but self-blame is a common consequence of cheating.