Hi there. Thank you for your question. I will be helping you out with your queries
If you have had a colonoscopy and have had your anal area examined then it is almost impossible to miss anal cancer.
I think that you are just thinking about it too much.
I understand that you are very stressed about anal cancer.
I am of the opinion that you should consult a psychiatrist. You will most likely require medications like paroxetine, fluoxetine, escitalopram to calm your nerves. You will also most likely require professional counseling. I understand that this is not your fault and these thoughts just pop up in your mind but you do need to have this taken care of. You certainly do need to see a professional for this.
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That is true.