CRV - alignment problem?

Sorry I couldn't be more specific in the title, but it's difficult to describe. I've got a '99 CRV, and lately I've been noticing it's not riding well. As I'm driving the wheel pulls a bit to the right, but it's not constant. I guess I'd say it's more of a click on rotation - if that makes sense - it's slower at slow speeds, faster at fast speeds, etc. It doesn't start right away, but within about 5 minutes of driving.

On my way to work at my old job I drove over several sets of train tracks during the day. I'm wondering if I've knocked my car out of alignment with that? Any insight would be appreciated.

Thanks!