Welcome to the forum . . . we are glad that you choose to come by and be part of the group . . .
When anxiety affects our physical body with the symptoms you describe, it takes a while for the body to heal. But, there is not set schedule as we are all different . . . .for me, muscle discomfort / pain is often relieved by soaking in a hot bath with Epsom Salts for about 20 minutes . . . it tends to relieve the tension . . .
Now, if you are having anxiousness or anxiety episodes, then you may want to consider getting some type of professional intervention to help you identify the root causes and manage the body's reactions . . . in the meantime, check out your lifestyle in terms of what you are eating, if you are getting exercise (and it does not have to be preparing for the next Ironman challenge), perhaps using mindfulness to help calm the mind, etc.
There are loads of good suggestions in prior posts and I am sure that many on this forum will suggest them to you again.
Glad you came by, do let us know how you are doing, and remember that dealing with anxiety is deciding on what suits us the best as individuals . . . . but we are more than willing to share our experiences as you have shared yours . . .thanks for that, take care, kc