Hi Leah,
First. You should be commended. It is one of the toughest and bravest things to even attempt what you’re doing. I agree with what Matt said. I have been training in martial arts since I was 4 years old. I have seen a lot of things. My opinion is that maybe your sparring partner is going too hard on you. Her skills may be to advanced for you at the moment. You should ask for a partner who is about your skill level or a little better. Sparring someone too advanced will kill your confidence. It would be like playing tennis against Venus Williams. You won’t learn anything and end up feeling frustrated. Take your time and go slowly.