Hi Raf,
I wanted to leave the truth when about your age but first needed to leave home to get out of the control of my overbearing parents. When I moved out I felt so lonely even though I was living around new friends. I tried to hang out with other people all the time, wanted to get into a relationship even though I wasn't ready for it and spent lots of time doing hobbies.
I was still going to meetings at that time but it was a massive shock to leave home even though I didn't have to contend with "losing my family". I think fragile was the state that most described it.
When you're not sleeping it has a negative impact on your wellbeing, perspective and will aid confusion. You've done a brave thing to stand up to your family and religion and state you want to be honest in how you live. This has clearly been a shock to your system to see your parents so upset and that you seem to be the cause.
You haven't done anything wrong. Your parents have been programmed to view your reasons for rejecting the truth as worse than a criminal act. Even leaving home on good terms is still very hard for someone of your age. To leave and have this huge disapproval hanging over you is going to cause you distress.
If you choose to go back, do so on your terms. Go back but stand by what you believe in which is that you do not want to go to meetings and that you will be the person you are. Just be honest. Maybe rather than going back you can just spend some time with your family.
I hope goes well for you.
MMXIV