Are tonsil stones bad?

Hi everyone, the other day I was teasing my boyfriend because he occasionally has tonsil stones and he spits them out when he brushes his teeth, then I said haha ​​how disgusting and now I think my karma has caught up with me and this morning when I got up I took a sip of water and it felt like I had swallowed a small tablet or something, then I looked in the mirror and opened my mouth and there was a small round hole or hollow in the side of my throat and I thought to myself no or I really did have a tonsil stone, how disgusting is that contagious, did I get it from my boyfriend or is it completely normal and the fact that I now have a small hole in my throat is that something dangerous, I must also say I have a bit of a cold, my mum is ill and has infected me but nothing serious, I have a sore throat and a runny nose and also this stupid white coating on my tongue, maybe the tonsil stones are coming from Because I'm sick and I don't have to worry about it? Can I treat it or prevent it from happening? What should I do, folks! Thanks!