What are my right as a tenant as far as privacy, health concerning issues, breaking of the lease, and excessive punishments?

Hello. So im in a little of a tight spot with my landlord. I rent a room in camarillo, ca from this lady. She doent live there and two others people lived there, one being my friend, but they have both left at this point. Last week my friend was evicted from his for having a friend over. It doesnt say in the contract that we cant have anyone over but she evicted him anyways which lead to problems with me indirectly. That happened on tuesday 9/2/15. On friday 9/4/15 she rose my rent by $20 stating that she was enforcing a rule of increased utility use even though in the contract she stated she would pay for utilities. At this point i feel she is trying to get me to leave and is discriminating against me. I have a small fan in my room that i keep running and she says its costing too much electricity even though im only home at nights. She also states that she pays all utilities. I feel like she is over expressing what excessive utilities are. There is also mold all over the place.