Yes our worrying for nothing as there is no risk fingering your butt.
I went to the doctor today and was diagnosed with having an anal fissure. And I was prescribed some ointment and a suppository. The doctor said he didn't see any sores or lesions just a small cut. But my question is I've read online that heroes can cause anal fissures and that worries me. Am I worrying for nothing? Is there absolutely no risk for me getting herpes?
Herpes only exists in the region of infection. Hence only the genital area would be infected and capable of infecting you in the situation described.
Hence the fingering is of no risk of herpes transmission to you.
As for the scab, the most common place for a herpes scab is on the penis and is usually a patch not exceeding say half an inch, usually smaller. This scab does not seem to be on the penis.