Should I keep homeschooling my daughter or send her to public school next year?

Ok, here's the situation... I have a 9 yr daughter and I've been homeschooling her since grade 2. She's the only child and I'm a single mom. I decided to homeschool her because of the lack of values in the school system. In addition, she is very bright and she couldn't really "advance". Anyway, since about a month ago, she developed a phobia after having had the flu back in November (she threw up 30 times). Now, she won't go to her lessons (choir, dance, etc.) and doesn't want to face her friends. When she does, she's fine but it's the anticipation that kills her. Also, because of this, she has temper tantrums almost every day when she can't have what she wants. I'm going crazy because this is very hard on me. We barely go out anymore and I'm starting to have cabin fever. We're going to see a psychologist but that's only in March. Now, I'm wondering if she's be better off in school because she used to be such a social erfly before this incident. Any advice, suggestions or hints?