Periods ; Rants / question.

Why Does wearing a tampon hurt so bad? 
When I'm on my peiod I tend to wear a tampon. Most of the time it doesn't hurt so bad. But here lately it hurts. I don't understand. 
And then when I'm on my period... I feel not motivated to do anything. And my head hurts and cramps ? 
Backache nausea , and that's not all.  My peiod never stops on time. That makes me feel worse . 
And most of the time when I'm on my period i feel so sick. I normally have a feaver sick to my stomach. It's just horrible. 
Any suggestions?