Dose anyone know what's going on?

Ka
I have sore nipples, pointy and pinkish brown. I feeling sick but not being sick and had a scratching pain in my left side a few days ago. I also get a bit dizzy/tired now and then. 
My last proper period was July 20th - 24th, though I did have some brownish blood 6th - 8th October. It looked like old blood similar to when your period has ended but when I only wiped, not much at all. Not in underwear or on a pad. So I tested today and got a negative result, what's going on? Has anyone had a similar situation?