It seems to me you have a much bigger problem than being grounded here.
You say you drove back home, so I assume you are an adult (legally). It seems to me that your mother is a massive control freak, and you are either too submissive or goodness knows what else to stand up to her. If you are uncomfortable, simply move out. Otherwise talk to your mum, and establish some sense in the household, and some peace, and tell her not to shout any more, etc., etc.
If it was me, I would move out. Do you study at a uni? Perfect time to move out, get a part time job, and study + work. Rent is very cheap if you live in student dorms, and even cheaper ($10 a night, or a week, I forget, at my local hostel, though I don't live there, but not terribly luxurious) at a hostel.
If you are in fact a minor, and took a taxi or something like that, well I suppose you can ignore her, don't speak to her, until she behaves normally. Talk to her about it first. Then when you can, move out.