Can I use tea tree oil and aloe vera gel for my acne while on oratane 10mg? (Photo)

Hi I am another teenager that suffers from severe acne and I am currently on oratane 10mg. I am in my second week of my treatment and yes my acne has gone worst and skin is very dry. I just wanted to know if I can use tea tree oil with aloe vera gel for my acne . And if I can how much can I use as my skin is sensitive and oily.