[Kumagoro]

It doesn't sound abnormal. It could be that you're not turned on enough, which will make penetration of any sort uncomfortable. If you're comfortable, relaxed and turned on, it becomes much easier. Also, if you're not "moist" enough down there, it hurts a lot more, so don't try to force it if you're very dry. It just shouldn't be forced; if it hurts, stop. If you try with your boyfriend, consider other types of foreplay before fingering. From my experience, it is less painful if you're comfortable, and a little bit horny.