There's something strange in my body

The thing it's this, I have a hard little ball in the opening of my cervix, I felt scare because my sister had cervical cancer, so I panic a little bit, apart of that, I felt weird in my womb, I had a Quist before so I thought it can be that, my belly has grown and sometimes it hurt a little bit, nothing serious but I don't feel it regular in my cicle, talking about it, my cicle only last for 3 days and it's not abundant, like it used to be, I don't know if someone has having something like this before, I feel concerned for the little ball a have in my cervix, it's hard, doesn't move, and doesn't hurt, but it's something strange in me and it has been the same for the past years, I already went to doctors and I had received the same answer : a fungus, but the medicine that they prescribed never work and the problem it's the same, never change, I don't know what it can be, and doctors look like they don't care enough to really search.

PS. English it's not my first language so if I right something wrong it's for that!

Thanks for any information you can share with me! God bless you all.