Loud noise

Ftm. 23.4weeks. This evening my so and I took our godchild to monster jam (monster truck thing) and I didn't really realize it would be to loud until we were there. I had in ear plugs but didn't really think about my little guy until half way through. And then I sorta freaked out. It was only two hours but at one point he curled up in my side and was terribly painful. So of course I googled loud noise during pregnancy and it said that it could cause hearing problems and of course that only made me feel worse. So what I'm asking is has anyone else been exposed to a very loud setting and did your child have any lasting affects? I'm just kinda scared I put him in danger and well, I'm afraid I could have broken my baby