Thanks, I appreciate it a lot. Birth control seems like the best route to take since the OBGYN can't actually look to see what's going on being that I'm not sexually active.
Go see a doctor as it's not normal. You should have your period about once every 28 days (or slightly shorter/longer) lasting no longer than 7 days. You may need to look into taking some birth control pills to help regulate your period so something like this doesn't happen, but if this is the only time it has, your doctor may decide to have you track it.