Re: vaginal tearing
My girl, when you try to have sex without being sufficiently aroused, the vagina is dry and prone to tearing. Ask him to be tender and caring with you before he has sex, so that you become aroused and wet. An injury may happen if you use sex toys. It is better to use some kind of lubrication before inserting the toy.
Forgive me for mentioning it, but I am sure you will appreciate it that if you are not using a condom, you are bound to get a lot of other nasties, worse than yeast infection. So please protect yourself. You are way too young to be suffering from serious infections which will jeopardize your chance of having children in the future. Not to mention getting pregnant now....