Which dosage of Roaccutane should I take now ?

Hi, I have Mild to moderate acne. My weight is 65 kg, height 168 cm. I had roaccutane 2 years ago with dosage of 10 MG per day for 3 months. Now my acne came back. Please advise me the dosage and how long I should take Roaccutane now to be effective. I want your opinion before going to my doctor. And how long should I wait to get pregnant after the course? Thank you!

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