New pimples on Accutane. Is this normal?

It is common to break out while on Accutane.  Sometimes significant improvement isn't seen until at the end of the recommended 20 week therapy.

When Accutane is first started especially the first 2 months it is not uncommon to get new acne bumps forming. Sometimes it takes a few months before a lot of the acne drys up and goes away.

Yes, completely normal. Accutane works from the bottom up meaning that you will often breakout at the beginning of a course. This is because the pores are changing and forcing everything out. It is fine and totally normal. Continue on your regimen. "This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."