❗️TMI❗️ numb legs?

Sooo... I normally get horrible periods. However, this month was different for me. Just yesterday I went to the market with my SO and we were just shopping around when all the sudden I looked at him and said "do your legs feel funny?" And he said "babe what're you talking about?" And I said idk my legs are numb and shaking like crazy. They were tingling and almost completely numb from upper thigh to feet. Then all the sudden were walking to the car and he looks down at my legs and goes "umm.. babe..." and I look down and blood is just flowing down my legs and my underwear is completely drenched in blood. (Sorry for the tmi). Keep in mind, I had JUST put in a supper plus tampon 15 minutes before this happened. Why could this have happened? What should I do? Is this normal? Today I have migraines and dizziness. My head feels like a brick was just dropped on it.