This is for my son, he is 20 suffers from migraines. 3 months ago he got botox. 2 weeks ago he started feeling dizzy when he stood. But now he turned his head to answer someone and he stumbled backwards and fell to the gound. Does these side effects happen because the botox is wearing off. He does go for his next treatment with the neurologist this week. Or should he go to the family doctor.