hello Abbie.. I understand your concerns about the ongoing condition.in the current scenario, I would suggest you undergo a biopsy of your itch bumps.. Only that can give an accurate diagnosis about the dermatological condition prevalent. Bacterial and yeast infection can be ruled out by simple culture of the swabs /scraping taken from the lesions.Was it done before you started the medication? Also ,in your age , the multiple bruising on your legs should be investigated by a few blood tests before you start on the therapy. Vaso vagal syncope in generally treated by avoiding the triggering factors like prolonged standing , stress, coughing hard etc.Drink lots of fluids with electrolytes ,juices , sports drinks etc. You should discuss the above with your guardian and visit a dermatologist to get started on the same. Hope this is helpful.Take care.