Why does my head hurt on rides?!

Now I’ve been searching everywhere but no one seems to have the same problem as me. On Rollerocoasters with straight drops, no matter a tame wooden roller coaster like the comet at Hershey or El Toro at Great Adventure, I always get this horrible pain in my head. It makes me super tense and squeeze. It helps if I scream, but it’s pretty weird, since I’m not scared. As much as I love coasters, it prevents me from riding sometimes because I don’t want to deal with the pain. If anyone shares the same thing or at least knows what it’s called please let me know