Ok. I made this questions before but I didnt explain it well enough.

One day I walked into band class and picked up my trumpet like usual. When I opened it all three valves were open.(Valves are pushy things). This kid and I were in a mouthly fight like one week before I saw the open valves. When I saw open valves I made a theory of what happened. He masturbated into my trumpet was the first thought after thinking about what could have happened. He doesn't have best reputation and he carry's condoms around. I asked him if he did anything to my trumpet and he said no and I believed him 50/50. I'm worrying if he has HIV and if it passed into me. The trumpet didn't smell like anything and all my music was there. And it wanst gooey. I'm worrying if I have HIV now. Remember, I made this story up but I'm wondering if it might be true. I didnt wash it and already played on it. What would you do?