Can someone tell me if this is normal?

I have irregular periods and I hate it so much because when I do have my period there’s times where I’ll bleed for two weeks straight and the cramps are crazy painful! But I think the weirdest things are how my flow is unbelievable heavy like blood will get on my thigh and I have to keep constantly changing my pad then sometimes during my period, my vagina starts to hurt like a small stinging pain! I have no idea if that’s normal or not so I would really appreciate it if maybe someone who also has irregular periods could tell me if they’ve experienced these things too