How much Molly should I take?

[SarahDuffy]

I'm going to a concert tomorrow night and me and my 2 other friends want to take some molly but i only want to feel it a little not tooooo much because we are drinking and we are petite girls like 115 pounds. We wanna feel it but not freak out. So we were gonna split .2 grams between the 3 of us. Is that too much or too little? suggestions? is it bad if i mix with alcohol? help help!