Moving this to Unregulated Mods...
First, what
@Zamazam said - don't use that build until you get an ohm meter. Don't use a mech at all unless you have an ohm meter. I'm not familiar with that battery, but if it's got a 20 amp limit 0.3 is your safe limit, 0.2 is pushing it, any lower is a game of Russian roulette any time you aim that thing at your face.
Yes, it could hurt you if you don't know what kind of power you're pushing through it. The heat being generated is nature's way of warning you that you're playing with fire. Go grab an ohm meter from a local shop or online and let us know what your reading is - post a pic of your coils if you can.
I've got a big beginner's guide to advanced vaping thread pinned in the "Help I Have Questions" subforum - check that out and report back to us with your reactions. Hope this helps - I don't mean to come down harsh, but "I don't know what kind of setup I'm using and it's getting really hot" is a pretty scary situation...