Hello there, I'm new here, and actually i registered only because I want to post my question here

I'm polish, totally white girl, and I live in Vietnam now (students exchange).
Recently I was taking hormones (the contraceptive pills) but i stoped it in Vietnam.. I've never had much problems with my skin, few pimples before the period and that all.. But righ now I have a battle field on my forehead. I don't know if it's either the climate or the cause of stopping the hormones.. I went to the pharmacy and they sold me the T3 Mycin Clindamycin Gel 1%.. I read here that you don't recommend it, may i know why? Cuz all i got here is written in Vietnamese (which i'm not fluent with yet)
What else do you recommend what is not so expensive but good?