help please

Ok started my period the 19th in which my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> tracker told me it will start and it was right on time .. period was a bit lighter then usual but nothing not normal 6 days go by and I'm sorta bleeding like the last days of a normal period . But now 10 days this never stopped!!
I've had super heavy dark brown discharge it's texture is thick and slimy very little pink mixed it. No smell no pain nothing I just can feel it kinda gush out slightly. More when I use the bathroom .. kinda clotty ..
No pain no weird symptoms maybe boobs feel bigger and bloated a lot just annoying wearing a liner constantly and not understanding why it hasn't stopped! 
Some times I consider wearing a very small tampon because I'm leaking the liner .
Doctors appointment tomorrow just want to see opinions and try to sleep well tonight . 
I'm 26 years old 2 kids .. 12 and 6 years old .. not pregnant now and no birth control. 
I was wondering because I normally have heavy periods this  could be because my period wasn't as heavy( still heavy)  so it's taking longer to flush out of me weird thought