Thanks for your update and great to hear that your results have been good.
Regarding your questions:
The difference between 1000 and 2000IU is not huge as the assay that is use to quantify this has an error of around 2 fold. Yes, it’s important to keep an eye on this, but this is not a significant change.
People live long lives without medication, but having the drugs when they are likely to benefit you can improve your chances of preventing ill health and liver cancer down the line.
There is no evidence that tenofovir will affect a child’s development. Entecavir is contraindicated for people who are likely to become pregnant.
Yes, many people (including myself) have taken antivirals for long term and continue to live long healthy and active lives.