My vagina is really sore during my period and this has not happened before. my period is happening when it shouldn't be, and it's more like spotting?

Get checked for STDs: Any abnormal vaginal bleeding, including spotting between periods, needs professional evaluations. Vaginal or vulvar soreness also isn't normal. A yeast infection is possible, but unlikely to cause bleeding. An STD is a good bet for all symptoms, including herpes if there are blisters or sores. Or course STDs are possible only if sexually active and at risk. See a doctor ASAP. Good luck!