Am I doing things wrong? HAHA

Here's a cleaner, more natural version of your post while keeping the casual AlasJuicy tone:

People of AlasJuicy, ask lang and need tips.

Me 21 and my GF 22 had our first time last week. Before that, we already did oral a few times, and I also fingered her. Pero napapansin namin na every time we do anything sexual, the next day sumasakit daw katawan at puson niya.

I'm wondering if it's because I'm too aggressive when I finger or rub her. The thing is, she tells me she likes it that way. She really loves it tho when I go down on her sabi nga niya, mamaw daw.

Last week was our first time having sex. At first, I went in slowly because she said it hurt and she was even tearing up. I asked if she wanted to stop, but she said she wanted to continue. I started slow building it up muna then after a while, she told me to go faster and deeper, so I did. I could tell she was still in pain, but she never told me to stop. I kept on asking her while doing it tho.

Afterward, she said she didn't really enjoy the penetration because it was painful. I made sure she was already wet and we had enough foreplay. I told her maybe it's because it was her first time. Yes we did use lube.

The funny part is, she's actually the one who keeps asking me to be rough. She even joked that it's because I'm "too big" for her. She couldn't even take half during a BJ.

The problem is that she said she could barely walk for two days after because she was so sore.

Any advice on how to make penetration more enjoyable for her? We both want to improve the experience, especially since she's interested but the pain keeps getting in the way.