Are you asking for ways to better cope with the fear and rumination? Are you asking about medication recommendations?
Ruminating can keep people in a perpetual state of fear and anxiety. It can get you stuck in the "what if's" and that can get very overwhelming.
Some ways to stop ruminating. Is to catch yourself when you're ruminating and literally shout out "stop". This will interrupt the thought processes. Then talk to yourself about everything you have already endured "surviving cancer" and other times you have been strong and successful. Have a list of things to do that will make you feel better, call a friend, exercise, listen to happy music or a watch a funny movie to bring yourself back to the here and now instead of being in the "what if's". Schedule a certain amount of time to worry each day and then after that time is up, go onto something more fun or productive.
Also, I would suggest a support group. If the panic or agoraphobia is still affecting you, you can try online support groups to begin with. If you don't already have a therapist, I would suggest seeking a therapist for support during this transition back to work and to coping with other anxieties. Also, if you are able to go out and meet new people, it is never too late to start meeting and building a support network so you don't have to feel alone in this world.
For the heart rate I would suggest deep breathing. To help bring it back to normal. You can breath in for 7 seconds, hold for 7 seconds, and then exhale for 7 seconds. repeat until you are feeling a decrease in your heart rate.
I'm sorry you are feeling afraid right now. I'm glad that you did
reach out to someone for support. It will make it easier to reach out to build your support network.
I hope this answer has helped. If you have any other questions, please feel free to ask.
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