I have a serious question about my cervix?

Ok I had a pre cancerous cells taken off about 14 years ago by freezing them off. I became pregnant this year. Was having trouble dialting and they said I had scar tissue and broke it loose from my cervix and I ended uo having a vaginal delivery but here is the question. I am on my period and was putting a tampon in and happened to rub against this knot. It small but kinda pointy and very hard. It is painless. Upon further examining I noticed that there is another one on the side of it and also on the other side of the cervix opening. They are all hard. I always have bleed pretty heavy the first few days of my cycle due to endometrosis so I wouldn;t have seen a difference in my bleeding. So I guess my question is....could this just be scar tissue from them ripping it open or is it more serious such as cancer? I am well aware I need to see a doctor but I need to know what the heck this is. I am freaking out about this. Does cervical cancer feel hard like that on the cervix?