it seems like she is biting out of fear so i would stop trying to tame her and just leave her alone. she may eventually grow out of it. work around her, change her water, substrate and take her out only when necessary. shes still young and you have lots of time to work with her and i would think that putting her back after a fit of biting will only condition her to strike and intimidate you when she wants to be left alone. let her get used to you by working around her with only necessary handling and then see if her behaviour has changed within couple months.

this has worked for me and hopefully it may help you.

good luck!