No, it's not "normal" to be a 9 each time you have your period, but it's more common than you think... but people shut up about it, urgh. I definitely suggest speaking to a specialized doctor because it may be an underlying condition and something may be possible to be done about it (doesn't have to be anything scary, no worries, but imagine if it's gone!). It's true painkillers are not ideal for you (I avoid them as much as possible), but I certainly understand you taking them, it's ok, and your mom shouldn't make you feel that way because she doesn't seem to understand how much pain you're in. Not everyone has the same experience at all and assuming we all do is ignorant.