I hope I never get shingles, I will be looking into the Shingrix vaccine as soon as possible. 8 out of 10 is pretty high pain I can confidently say, having been there and above 3 times for sure (a bunch of other stories).Mine is mostly itchy now but they say the pain can be 8 to 10 out of 10 for some people.
My dad had a DVT - he was travelling for work and he was lucky he was with someone clued in enough to drive straight to the hospital after looking at him.
Best wishes on the recovery to both of you.