I have acne n after trying several products for years i finally got tretinoin cream 0.25% so after 4 weeks of using it i barely see difference . after 4weeks of using i have got 7 pimples with some small pimples n Is this a purging state n after finishing this when i went for medical store to buy a new one they said it;s out of stock so it'' take abt 10 days to come so it will work the same or should i stop from now ? N Some tips on my acne .. sry i havent clicked pictures wid my acne .help me