Need some general advice for making sex feel better

For context, I am a trans guy taking testosterone. I haven’t had any surgery yet. Recently I was experimenting sexual with one of my friends, and during any sort of penetration I experienced a burning sensation. We used plenty of water based, unscented lube. I went to my gynecologist today and got tested, no infections. I have an IUD but everything seemed fine with that as well, and no vaginal atrophy (not yet at least, T can cause that). I’m wondering if it’s just dryness? She said to try silicone based lube and Vaseline to help moisturize myself down there. She also said that I could try a laundry detergent for sensitive skin since I had also been pretty itchy down there for a long time. Has anyone else experienced this? What worked for you to get the burning sensation to go away during sex?