Painful sex? Please help!!!

So this started recently. It hurts when my boyfriend's penis is first entering me, and while he is in. I have had sex with him before and it did not hurt. We used to be able to have sex 2-3 times a day without pain. There was the occasional tearing but nothing horrible. I usually keep it bald down there but recently he wanted me to grow it out to see if that helps with the problem.

When I was bald I would sometimes get very itchy to the point my lips, clit and around my vaginal opening would be red, swollen and painful. It hasn't happened since I started growing it out, about 1 week ago.

I bought some vagisil anit itch cream which almost numbs me and immediately stops itching (highly recommend this product lol) anyway, so I am just confused if it is a yeast infection causing all of these problems or something worse. I am 19 years old and I did buy some yeast gard supositories because that's all they had at the store, I would have preferred the pills, but the pain inside my vagina is usually on the right side of my body and when he strokes it hurts more, we have tried different positions, some hurt less than others, I am always super wet so I dont think that's the problem.

Anyway, with the supositories, I have never used those before and I am afraid to tbh, i know some of you will be like "if you had a dick in you you'll be fine." I've used tampons but prefer pads. I just dont know how i feel about them. I want to know if It will help me and I know the only way is to try it. I am just hoping someone may know what is going on because I am scared and it really sucks to have to stop having sex because of my internal vaginal pain. It just makes me sad.

Thanks in advance for any advice.