Lips can be made more symmetric or fuller with hyaluronic acid products. With evaluation, the choice of filler can best be determined. I would likely go with Restylane Silk.
Typical treatment course is 5-6 months. If your dosing needs to be lowered due to side effects or your comfort, that treatment time could be extended. Total cumulative dose is important for optimum outcomes.
10 mg daily accutane is a very low dose. With standard dosing, improvement is usually seen towards the end of the second month. For optimum results, the total cumulative dose is important, so more months of treatment are required for people on lower doses. It is important to follow up monthly with your Dermatologist to monitor for any side effects and/or needs to adjust your dose.
Oral antibiotics do take time to see the full effect. I recommend 2 months before changing treatment. If your acne can not be controlled with the oral and/or topical treatments, you and your Dermatologist can consider if you are a good candidate for Accutane.
I don't recommend any procedures or laser treatments while on Accutane because healing can be impaired. For an elective surgery such as breast augmentation, I would recommending waiting many months after you have completed your accutane course so as to maximize your healing results.