How should I go from here?

I am 17 years old, turning 18 in December. I have a slight case of paranoia, I have had a gf for almost 9 months and have been sexually active since our 2 month mark. My mom wants me to be open and communicative with her, but she punishes my for any display of emotion, describing it as adolescent, irrational and inappropriate. I plan on moving out within the next month because I don't like my home environment. I have someone who will rent me a room for $300 a month with a security deposit.

Going back to the topic of me and my gf. She has 2 moms, one of which is about like my mom and the other claims to be fair and open minded but is highly conservative, and controlling. Me and my gf were caught having sex as safe as we could at her house, and now her moms and mine choreograph my relationship so me and my gf can only see each other under intense and hostile supervision. I don't trust my mom enough so I lied about going fishing to spend time with my gf, and my mom looked through my phone and found out. I need some help and advice, so my question: how do I go from here?